I've got an aunt/uncle/cousins near Newburgh... didn't know the General was there.
I was born in White Plains, NY. I remember going to Washington's headquarters in N. White Plains... looking out the windows (were wavey so assume they were the original window panes) and seeing a stamp/press that was used to make bullets... this was in the 70s. During the tour of the headquarters it was mentioned by the guide that the mfg. bullets were made from silver... probably to take out those nasty warewolves back in the 18th century :-)
I visited The General’s headquarters in Newburgh this summer...definitely worth the trip. And, while he was only in White Plains for a short time (he had to stay ahead of Cornwallis), he was in Newburgh for almost a year and a half (Cornwallis was gone).