I just noticed this. I knew Rev. Howard got Rev. Mayhew's church, but not his widow too. See here:
Dr. Howard was first married in December, 1771, to the widow of Dr. Mayhew, his predecessor. She died in April, 1777, at the age of fortyfour. His second wife was the daughter of his early friend, Dr. Gay, of Hingham. He left one son, Dr. John Clarke Howard, sometimes called "the beloved physician," who was graduated at Harvard College in 1790, and died in 1810, aged thirty-eight years.
Dr. Howard, in his religious opinions, was probably always an Arian. ...
Here is one of Rev. Howard's political sermons where he substitutes political liberty for spiritual liberty and arguably inserts non-biblical rationalist principles that supersede the Bible's text into the pulpit.