He was appointed a captain in the Royal Navy[1] and served in American and West Indian waters in the Seven Years' War.
[6][7] He died at his Town House, 51 Upper Harley Street, London, on Friday, 1 August 1794, at age 60.
"In the death of Sir Henry Martin, Baronet, late Comptroller of the Navy, the world has been deprived of one of its noblest ornaments; for as such, must ever be esteemed a character replete with every virtue that can dignify human nature.
The uprightness of his actions in his public capacity is too well known to need the testimony of an individual; and in private life, those who were so happy as to know him best, daily saw in him the kind indulgent husband, the tender affectionate father, the firm and faithful friend.
He died sincerely lamented by all; and to fum up his character in one short line, "The feat of every virtue was his heart!