HOWE, Richard (1726-1799), Viscount, Admiral, Royal Navy. Letter signed ("Howe") TO GENERAL SIR WILLIAM HOWE (his brother), on board the flagship "Eagle," "Off the Coast of the Province of Massachusetts Bay," 20 June 1776.  1½ pages, folio (12 x 8 in.), neatly inlaid to a larger sheet, very slight separation along one fold, the text in the fine cursive hand of an aide. Fine condition.