The Presbytery of Suffolk County, established April 1747, was the governing body for Presbyterian churches in the East Hampton area of Long Island. The Presbytery ordained Occom on August 29, 1759 and remained his ally and supporter throughout his life. It is likely that the Presbytery's support for Occom stemmed in part from the presence of Samuel Buell, who was one of the Presbytery's founders, an extremely influential member, and Occom's close friend. Several of Occom's missions fell under the Presbytery's authority, including his early work among the Montauks and his missions to the Six Nations in the early 1760s. The Presbytery ceded their claims to Occom in 1765 so that he could go on his fundraising mission under the authority of the Connecticut Board. Occom was again involved with the Presbytery after his return from Great Britain. In 1791, he transferred his allegiance to the Albany Presbytery because it was closer to Brothertown. The Suffolk Presbytery was a member of the Synod of New York (after 1758, the Synod of New York and Philadelphia).

East Hampton is a town in New York's Suffolk county on southeast Long Island, 14 miles southwest of Montauk. East Hampton was originally inhabited by the Algonquin-speaking Montauketts, who numbered over 10,000 and had a peaceful trading relationship with the nearby Pequots until early 17th century when English colonists played the two tribes off each other. In 1640, after the Pequot War, an English settler named Lion Gardiner purchased an island in the bay between the present-day towns of Montauk and East Hampton from the Montauketts, which began the English settlement, or seizure, of the land that would become East Hampton. The Montauketts called the island Manchonacke, or island where many died, while Gardiner named the island after himself. In 1648, the colonies of New Haven and Connecticut purchased more land from the Montauketts, spreading beyond Gardiner's Island onto Long Island and settling the town of East Hampton. In 1664, East Hampton was annexed to the colony of New York. As the number of English settlers increased, the Montauketts became increasingly dispossessed, economically tied to the English but relegated to the bottom of the social order. By 1687, the English had fenced off the majority of Montaukett land through a series of resolutions, changing the tribal structure of the Montauketts and leaving them open to conversion to Christianity. In 1749, Occom had been released from his preparatory studies for college because of poor eyesight and went on a summer fishing trip to Montauk; he decided to settle there and by November had established a school for the Montauketts. He frequented East Hampton on his travels to New York and New England from his home in Montauk beginning in 1750, often staying with Reverend Samuel Buell of the Presbytery of Suffolk County, who presided over Occom's 1759 ordination at the Presbytery. While traveling through East Hampton, Occom also stayed with William Hedges, a whaling captain and one of his benefactors. One of Occom's letters indicates that Hedges took care of Occom's family while he completed his mission to the Oneidas in 1761. Occom's relationship to East Hampton changed in the 1770s, however, when he started to believe that the pervasive English influence on Montaukett society had become corrosive. As a result of Occom's encouragement, many of the Montauketts of East Hampton moved to Brothertown in the late 1780s.

Lebanon is a town located in the state of Connecticut southwest of the town of Hartford. The land that became Lebanon was inhabited at least 10,000 years ago based on the archeological record. By the 1600s, the land was permanently inhabited by the Mohegan Indians, who used the area primarily for hunting. Lebanon was officially formed in 1700 when English settlers consolidated a number of land tracts, including several land grants by the Connecticut General Assembly and lands purchased from the Mohegans. However, these purchases were controversial. In 1659, the Mohegans entrusted their reserve land to Major John Mason, and in the following year, Mason transferred this land to the Connecticut colonial government with the understanding that there would be enough land left for the Mohegans to farm. The Mohegans claimed that they never authorized a transfer to the colonial government and only Mason’s heirs were entrusted with their land. In 1662, Connecticut, which included the Mohegan land that had been entrusted to the Masons, was incorporated by a royal charter. Based on this charter, the colony argued that the land was now the property of the government. In 1687, the colony began granting the Mohegan land to townships, and in 1704 the Masons petitioned the Crown on behalf of the Mohegans, claiming that such transfers of land to townships were illegal. Between the years of 1705 and 1773 legal disputes and controversies persisted, finally ending in a verdict by the Crown against the Mohegans. In 1755, Wheelock received property and housing in Lebanon that he would use as his house and school. While Lebanon was originally incorporated as a part of New London County in 1700, in 1724 it became a part of New Windham, before once again becoming a part of New London County in 1826. Lebanon was central to the American Revolution with half of its adult population fighting for the colonists and hundreds of meetings convened in the town for the revolutionary cause.

Buell was a popular Presbyterian minister during the second half of the 18th century in Long Island, as well as a close friend of Samson Occom. He was ordained in November 1743, and was a popular itinerant minister before settling at Easthampton. He preached at Occom's ordination, published the sermon in 1761 to raise funds for Occom (he also wrote the letter addressed to Bostwick prefacing his publication), and stayed in close contact with Occom even after Occom's public break from Wheelock. Occom's diary is full of references to visiting Buell and to their close friendship. During the Revolution, Buell was the only minister on Long Island for 40 miles, and was very active in assisting the American cause. He also founded Clinton Academy on Long Island in 1785, which was the first private school chartered by the New York Board of Regents. This academy was also remarkable in that it admitted women. Multiple historical sources have misconstrued Samuel Buell as Sol or Solomon Buell, likely because Buell sometimes signed his name Sa.l, a creative abbreviation of Samuel. However, there was no Reverend Solomon Buell in Easthampton, or, it seems, Long Island, in the second half of the 18th century: Samuel had no brothers, and were there to be two Reverend S. Buell's within 10 miles of one another during the same period, related or not, doubtlessly someone would have commented on it. In addition, the handwriting in letters ascribed to "Sol" and those assigned to Samuel is identical. Lastly, the only source besides collection manuscript 765530.3 describing a "Solomon Buell" is an anthology of letters from the Revolution, which contain letters from a Rev. Sol. Buell, or S. Buell, about aiding the American cause. These letters correspond well with descriptions of Samuel's life in an 1809 biography of his life, and, as he was the only Reverend but one for 40 miles during the Revolution, it is likely that these letters belong to him.

Eleazar Wheelock was a New Light Congregationalist minister who founded Dartmouth College. He was born into a very typical Congregationalist family, and began studying at Yale in 1729, where he fell in with the emerging New Light clique. The evangelical network that he built in college propelled him to fame as an itinerant minister during the First Great Awakening and gave him many of the contacts that he later drew on to support his charity school for Native Americans. Wheelock’s time as an itinerant minister indirectly brought about his charity school. When the Colony of Connecticut retroactively punished itinerant preaching in 1743, Wheelock was among those who lost his salary. Thus, in 1743, he began operating a grammar school to support himself. He was joined that December by Samson Occom, a Mohegan Indian, who sought out an education in hopes of becoming a teacher among his people. Occom’s academic success inspired Wheelock to train Native Americans as missionaries. To that end, he opened Moor’s Indian Charity School in 1754 (where he continued to train Anglo-American students who paid their own way as well as students who functionally indentured themselves to Wheelock as missionaries in exchange for an education). Between 1754 and 1769, when he relocated to New Hampshire, Wheelock trained approximately 60 male and female Native American students from nearby Algonquian tribes and from the Haudenosaunee (Iroquois) of central New York. At the same time, he navigated the complicated politics of missionary societies by setting up his own board of the Society in Scotland for Propagating Christian Knowledge, although he continued to feud with the Boston Board of the SSPCK and the London Commissioners in Boston (more colloquially called the New England Company). By the late 1760s, Wheelock had become disillusioned with the idea of Native American education. He was increasingly convinced that educating Native Americans was futile (several of his students had failed to conform to his confusing and contradictory standards), and, in late 1768, he lost his connection to the Haudenosaunee. With his inclination and ability to sponsor Native American missionaries largely depleted, Wheelock sought instead to fulfill his ultimate ambition of obtaining a charter and opening a college, which he did in 1769. To fund this new enterprise, Wheelock drew on the £12,000 that Samson Occom had raised for Moor’s Indian Charity School during a two-and-a-half year tour of Great Britain (1765 to 1768). Much of this money went towards clearing land and erecting buildings in New Hampshire for the Charity School’s relocation — infrastructure that also happened to benefit Dartmouth. Many of Wheelock’s contemporaries were outraged by what they saw as misuse of the money, as it was clear that Dartmouth College was not intended for Indians and that Moor’s had become a side project. Although Wheelock tried to maintain at least some commitment to Native American education by recruiting students from Canadian communities, the move did a great deal of damage to his public image. The last decade of Wheelock’s life was not easy. In addition to the problems of trying to set up a college far away from any Anglo-American urban center, Wheelock experienced the loss of relationships with two of his most famous and successful students, Samson Occom and Samuel Kirkland (an Anglo-American protégé). He also went into debt for Dartmouth College, especially after the fund raised in Britain was exhausted.

Samson Occom was a Mohegan leader and ordained Presbyterian minister. Occom began his public career in 1742, when he was chosen as a tribal counselor to Ben Uncas II. The following year, he sought out Eleazar Wheelock, a young Anglo-American minister in Lebanon, CT, in hopes of obtaining some education and becoming a teacher at Mohegan. Wheelock agreed to take on Occom as a student, and though Occom had anticipated staying for a few weeks or months, he remained with Wheelock for four years. Occom’s academic success inspired Wheelock to open Moor’s Indian Charity School in 1754, a project which gave him the financial and political capital to establish Dartmouth College in 1769. After his time with Wheelock, Occom embarked on a 12-year mission to the Montauk of Long Island (1749-1761). He married a Montauk woman, Mary Fowler, and served as both teacher and missionary to the Montauk and nearby Shinnecock, although he was grievously underpaid for his services. Occom conducted two brief missions to the Oneida in 1761 and 1762 before embarking on one of the defining journeys of his career: a fundraising tour of Great Britain that lasted from 1765 to 1768. During this journey, undertaken on behalf of Moor’s Indian Charity School, Occom raised £12,000 (an enormous and unanticpated amount that translates roughly to more than two-million dollars), and won wide acclaim for his preaching and comportment. Upon his return to Mohegan in 1768, Occom discovered that Wheelock had failed to adequately care for his family while he was gone. Additionally, despite the vast sums of money that he had raised, Occom found himself unemployed. Wheelock tried to find Occom a missionary position, but Occom was in poor health and disinclined to leave his family again after seeing the treatment with which they had met while he was in Britain. Occom and Wheelock’s relationship continued to sour as it became apparent to Occom that the money he had labored to raise would be going towards infrastructure at Dartmouth College, Wheelock’s new project, rather than the education of Native Americans. After the dissolution of his relationship with Wheelock, Occom became increasingly focused on the needs of the Mohegan community and increasingly vocal in criticizing Anglo-Americans’ un-Christian treatment of Native Americans. In September of 1772, he delivered his famous “Sermon on the Execution of Moses Paul,” which took Anglo-American spiritual hypocrisy as one of its major themes, and which went into four printings before the end of the year. In 1773, Occom became further disillusioned when the Mason Land Case was decided in favor of the Colony of Connecticut. The details of the Mason Case are complicated, but to summarize: the Colony of Connecticut had gained control of Mohegan land early in the 18th century under very suspect circumstances, and successfully fended off the Mohegan’s 70-year-long legal challenge. The conclusion of the case came as a blow to the Mohegans, and further convinced Occom of Anglo-American corruption. Along with David Fowler (Montauk Tribe), Occom's brother-in-law, and Joseph Johnson (Mohegan), Occom's son-in-law, Occom helped found Brothertown, an Indian tribe formed from the Christian Mohegans, Pequots, Narragansetts, Montauks, Tunxis, and Niantics. They eventually settled in Oneida country in upstate New York. Occom moved there with his family in 1789, spending the remaining years of his life serving as a minster to the Brothertown, Stockbridge, and Mohegan Indians. Harried by corrupt land agents, the Brothertown and Stockbridge groups relocated to the eastern shore of Lake Winnebago, though Occom died in 1792 before he could remove himself and his family there. Occom's writings and legacy have made him one of the best known and most eminent Native Americans of the 18th century and beyond.

After many months of planning and shifting personnel, Occom, accompanied by the minister Nathaniel Whitaker, sets sail in December 1765 for a two-and-a-half year tour of England and Scotland in order to solicit contributions to Wheelock’s Indian Charity School and missionary efforts. Introduced to aristocrats and prominent clergy by the minister George Whitefield, Occom preaches many sermons, travels widely, and collects a large sum of money.