Oneida is a city in Madison County located at the geographical center of New York state. Before European settlement of the area, the Oneida Tribe, one of the Six Nations of the Haudenosaunee (Iroquois) Confederacy, inhabited a large territory adjacent to nearby Oneida Lake. Around 1533, they built their first village on the south shore of the lake, at or near the mouth of Oneida Creek. At the end of the 17th century, this area began suffering raids by parties from the French colony of Quebec, in a battle to control the fur trade. In 1696, Oneida village was burned by the French. As a result, the Oneidas moved their chief village east of the original site, called Old Oneida, to a new site called Kanawalohale, also known as Oneida Castle, which was fortified by tall palisades and a moat. This is the site of the present-day village of Oneida Castle, a small hamlet west of the city of Oneida in the northwest corner of the town of Vernon. When used in Occom Circle documents, the place name "Oneida" usually refers to the territory inhabited by the Tribe east of Oneida Lake, but can also refer specifically to Oneida Castle. Although the Oneidas sided with the patriots during the Revolutionary War, much of their territory was sold or appropriated by the state of New York. In 1790, the first European settlers moved into the area of Old Oneida village, and the district began to expand. In the 1830s, the state built a feeder from Oneida Creek through the present city site to provide water for the new canal system, which enabled canal boats to ship freight into the town. Eventually, the railroad came through the town and helped with its expansion. This led to the incorporation of the Village of Oneida in 1848 and the establishment of the Town of Oneida in 1896. The town was chartered as the City of Oneida in 1901, and with two more railroad lines transecting the area, it became a thriving manufacturing center for the first half of the 20th century.

Connecticut is a state in southern New England that borders Massachusetts to the north and the Long Island Sound to the south. Its name is derived from the Algonquian "Quonehtacut," meaning "long river," referring to the Connecticut, which runs from the border with Canada into the Long Island Sound. The area was originally inhabited by Algonquian-speaking Pequots, Mohegans, and Quinnipiacs. European settlers took advantage of tribal divisions to establish dominance in the region. Dutch explorer Adrian Block sailed up the Connecticut River in 1614, establishing an active Dutch trading post at what is now Hartford. English claims to Connecticut began in 1630, but settlement truly began when Thomas Hooker, a Congregationalist minister now known as "The Father of Connecticut," left Boston to found Hartford in 1636. Hartford became the center of the Colony of Connecticut, which did not receive its charter until 1662 when Governor John Winthrop, Jr. secured it from Charles II. In 1665, the Colony of New Haven, established in 1638 by the Puritan minister John Davenport, joined the Colony of Connecticut under this charter. Early settler relations with local Indians were tense, and encouraged the New England colonies of Massachusetts Bay, Plymouth, Connecticut, and New Haven to unify as the "United Colonies" or "New England Confederation" and fight together, with Indian allies, in the Pequot War and again in King Philip's (Metacom's) War. These wars helped establish a specifically Connecticut and specifically American identity; the latter drove the colony to join the rebellion against Britain in 1776. Occom, born into a Mohegan household in Connecticut, was closely associated with the Colony and retained strong ties to the region throughout his life. He converted to Christianity in 1743 when the Great Awakening spread through Connecticut, and inspired Wheelock's Indian Charity School, which was founded in Lebanon, CT in 1754. He also became involved in the Mason Land Case, a long-standing dispute over the ownership of reserve Mohegan lands in Connecticut. Wheelock also had strong ties to Connecticut, moving his Indian Charity School only when the colony would not grant it a charter.

David Fowler was Jacob Fowler's older brother, Samson Occom's brother-in-law, and an important leader of the Brothertown Tribe. He came to Moor's in 1759, at age 24, and studied there until 1765. While at school, he accompanied Occom on a mission to the Six Nations in 1761. He was licensed as a school master in the 1765 mass graduation, and immediately went to the Six Nations to keep school, first at Oneida and then at Kanawalohale. Fowler saw himself as very close to Wheelock, but their relationship fragmented over the course of Fowler's mission, primarily because Wheelock wrote back to Kirkland, with whom Fowler clashed, but not to Fowler, and because Wheelock refused to reimburse Fowler for some expenses on his mission (767667.4 provides the details most clearly). Fowler went on to teach school at Montauk, and played a major role in negotiations with the Oneidas for the lands that became Brothertown. He was among the first wave of immigrants to that town, and held several important posts there until his death in 1807.

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.

Mary Wheelock was born Mary Brinsmead on July 26, 1714 in Milford, Connecticut. In the year following the death of his first wife, Eleazar began to court Mary Brinsmead, and the two married on November 21, 1747. Mary and Eleazar had five children together, including John, who would succeed his father as President of Dartmouth College. Little appears in the historical record about Mary, but many of the people who wrote to Wheelock, especially his Native correspondents who often lived with the family, referred to her warmly. In September 1770, Mary dismantled her longtime home in Connecticut, and travelled with her children to the Wheelocks' new home in the wilderness of New Hampshire. They rode in a coach sent over from England by John Thornton, accompanied by 30 Charity School students on foot. Eleazar, who had gone ahead to build housing for everyone, wrote a letter to Mary with many instructions about the move; the disposition of domestic animals, people, supplies; and the acquisition of money that suggests she was an able and trustworthy manager (manuscript 770510.1; this manuscript is not included in Occom Circle documents). She died in 1784 in Hanover, New Hampshire, where she is buried in the Dartmouth College Cemetery.