Fishers Landing is a post office in Jefferson County on the St. Lawrence River.
The cancel on the cover was a little light as well as being in blue, but thanks to Retroreveal, we are able to show the how cancel looks.
At the current time, I have a listing of over 600 different County and Postmaster cancels from New York State ranging from 1817 (Cooperstown) to 1902 (Wells).