Here is an excerpt from Brown's will concerning the Sinclair family.
03 November 1855
...To my youngest & beloved son, Hezekiah G. D. Brown...Sinclair, a yellow man aged about forty years and his wife, Kisiah and their children, Isaiah, Jim, Louise (reserving Archy, their youngest child to the singular use & bequest of grandson, Joseph Brown, son of son Hezekiah.
Isaiah Sinclair married my gg grandmother Alice Demyers Overton Usher's sister, Margaret Demyers. Isaiah was born about 1844, died in 1917. Margaret was born about 1845, died in 1936.