I am researching my 3G Grandparents Thomas Horton Johnson and Margery Case. I have found their marriage in the US Dutch Reformed Records for New York. They where married on Feb 21 1824 at Basher Kill, S. County New York. In the Congregation of Mahakkamack. I'm interested in finding out if Basher Kill is in Sullivan County and what community this is in or near. I have spelled exactly as entered in the record.