Trying to find any information on James Harkness and wife Sarah who were living in Colrain area of Franklin Co., MA from at least 1764 until their deaths there in 1797 and 1798.

James and Sarah had at least two children in Colrain - Martha born 1766, and William born 1764. Believe they were also the parents of Margaret, born 1767. This Margaret of Colrain married David Long of Shelburne.

Any help or leads appreciated.