In the fall of 1778, The English Governor/General William Tryon announced to all citizens of Eastern Long Island (Suffolk Co, NY) they had to pack up and go to Conn or take an Oath of Allegiance to King George.
He went to the east end and took an oath of all "men" (I see "men" as young as 15 listed) that chose to remain on Long Island.
The census is by town, and lists 2,677 men, their age, town of residence, and occupation.
I have scanned 18 pages of this census for Southold into 18 jpg files, totaling 10.3 Megs that I will send to people that ask for it.
I am not 100% sure of the chain of custody of the copy I have. I obtained a typed copy years ago from the Suffolk Co Historical Society. The original census obviously went to England first. There is a reference at the bottom of some pages that says:
"Great Britain, Public Record Office, Colonial Office Papers, Class 5, Volume 1108, Pages 262-263.