Rather than continue his various businesses or pursue a civil service career, Bacon decided to study for the ministry. He returned to the Isle of Man and studied under Thomas Wilson,
Bishop of Sodor and Man. At Kirk Michael, Wilson ordained Bacon as a deacon on 23 September 1744, and on 10 March 1745 as a priest "in order to go into the Plantations". Bacon's brother Anthony had moved to Maryland by 1733, and was working for his uncle, merchant Anthony Richardson until the latter's death in 1741, after which he continued in Maryland for a while, but circa 1749 moved to London to continue his mercantile career, which included the
transatlantic slave trade. A 1744 letter mentioned Thomas's prospective missionary career in the colony. The new priest sailed for the colony shortly after his ordination, arriving in
Talbot County and assisting the aging priest of St. Peter's parish, Daniel Maynadier, until the latter's death in 1746, when the vestry selected Bacon his successor and he accepted Governor
Thomas Bladen's appointment. Bacon became well known in the local area and in the colonial capital,
Annapolis, for his musical abilities (as member of the Music of Annapolis#Tuesday Club in the capital and the Eastern Shore Triumvirate), as well as his learning. His masterwork was a compilation of Maryland's laws, begun circa 1753 and published in three volumes in 1765. Bacon also wrote and published his colony's response to
Benjamin Franklin's publication in London concerning a border dispute between the colonies (ultimately resolved by the
Mason-Dixon line). Bacon also became known for his concerns with the education of children in his parish, and especially the religious education of African Americans. Himself a slaveowner, beginning in 1749, Bacon published several sermons lecturing masters about the benefits of extending religion to their slaves, and grave consequences should they fail to fulfill their duties. Like
Alexander Garden and
George Whitefield, Bacon reassured slaveowners that religious principles upheld their earthly authority over their slaves. Bacon started a school to instruct African Americans, and received books from the Anglican organization of
Thomas Bray. Two collections of his sermons were republished in London:
Two Sermons Preached to a Congregation of Black Slaves at the Parish of S.P. In the Province of Maryland, By an American Pastor (London, 1749), and
Four Sermons upon the Great and Indispensable Duty of All Christian Masters and Mistresses to Bring up Their Negro Slaves in the Knowledge and Fear of God (London,
Society for the Propagation of the Gospel 1750). In 1750, Bacon published a pamphlet and began a subscription to provide a school for free, manual training for children without regard to race, sex, or status. He solicited subscribers from other colonies, giving several concerts in Maryland and Delaware and even traveling to
Williamsburg, Virginia the following year to raise funds. The Charity Working School was built in 1755 and operated for a time, including under Rev. Bacon's successor as rector, but Talbot County officials ultimately converted it into a poorhouse. In 1753, Bacon served as clerk for the gathering of Maryland clergy, and during the following years acted as a moderating influence in several political disputes involving the Rev. Samuel Chase. In 1758, after the
French and Indian War, Bacon received the most lucrative and extensive parish in the colony, the newly organized All Saints' Parish in
Frederick County, which included most of Western Maryland. However, in that war, Bacon lost his only son, John, who as a lieutenant commanding troops from Annapolis, was killed and scalped near
Fort Cumberland. Bacon hired a curate to help him with the large parish, which was split after his death. Three years after his relocation to Frederick, Bacon opened another
charity school. Bacon was elected to the
American Philosophical Society in 1768. ==Personal life==