b.born before 1670, probably Ireland buried March 7, 1729, was an early American pastellist. Born Henrietta Deering, probably in Ireland, she married in 1705 and emigrated to America in 1707, settling in Charles Towne (now Charleston, South Carolina). A total of 40 pastel portraits by Johnston are known, dating from 1707 to around 1725. After her husband's death in 1716, Johnston was forced to support herself and her children, becoming possibly the first professional female painter in America. She's a very talented artist.