1From George Washington to Major General William Heath, 17 September 1776 (Washington Papers)
Some advices lately recieved from Powle’s hook, has made it necessary that Col. William’s regiment, should march to that post as a re-inforcement to Col. Durkie; it will be proper therefore they should be immedy put in motion towards Mount Washington, where they are to cross. Yr hhble Servt LS , in William Grayson’s writing, MHi : Heath Papers.