In 1718, Brinley married Deborah Lyde, a wealthy and socially influential heiress who was the daughter of a moneyed couple from Boston, Edward Lyde and his wife Catherine. Over the course of their marriage, the couple went on to have seven children together, one of whom, a son, was named Francis after his father. In addition to owning an equivalent amount of wealth as her husband, Deborah maintained connections with
aristocratic circles in England, which allowed her to emulate the most recent cultural trends and fashions in Europe, a comparative rarity in North America. Over the next decades, Brinley established himself as a prominent member of the Massachusetts
elite, acquiring extensive landholdings in
Suffolk County, including several large
hayfields. He also served in several legal and political offices within the
colonial government of Massachusetts over the course of his career, serving as an
assistant-surveyor and
justice of the peace; Brinley was appointed to the latter position by the
governor of Massachusetts,
William Shirley, on June 27, 1743. Brinley would also go on to serve as a
deputy surveyor-general of Massachusetts. Anglo-Irish philosopher and clergyman
George Berkeley made a visit to Britain's North American colonies in 1728. Accompanied by his family, he visited Boston, where his entourage was invited by Brinley to stay at Datchet House for the duration of their stay. Berkeley was attempting to promote the spread of
Palladian architecture in British North America, an architectural style that Brinley had ordered his to be built in; historian
Margaretta M. Lovell suggested that it was this factor which played a major role in Berkeley's decision to live in Datchet House while staying in Boston. The next year, Brinley commissioned Scottish-born painter
John Smibert, who had accompanied Berkeley to North America, to paint portraits of both himself and his wife and child. Smibert's portrait of Brinley depicted both
Queen Anne style furniture that he owned and Brinley's landholdings; the portrait Smibert made of Deborah and her son Francis depicted a small
orange tree she owned, an expensive rarity in North America. Lovell argued that given Brinley's wealth and European connections, "[it was] not surprising... that Brinley was one of Smibert's first customers". Beginning in the 1730s, Brinley started to dabble in
colonization projects as well. In 1732, the
General Court of Massachusetts issued a
land grant consisting of six square miles to a colonist named Christopher Jacob Lawton from
Suffield, Connecticut for a sum of money, in line with a boundary agreement negotiated in 1713. Three years later, Lawton divided up the grant and sold a portion of it (consisting of roughly a quarter of what he had purchased in 1732) to Brinley, who subsequently became one of the town proprietors of Suffield alongside Lawton and two other investors. ==Later life and death==