Jesse Silcott was living next door to his brother-in-law on the 1790 census. I research the Samuels family, if anyone's interested, but I have no further information on the Silcotts. The records for the Samuel(s) family are at the Richland Monthly Meeting in present-day Lehigh (formerly Bucks, then Northampton) County, so you might want to look there for Silcott records as well.
1790 Census, Northampton Co., Pennsylvania, p. 316. Upper Saucon Twp. William Samuel1 -2 - 3 next door Jesse Silhet [Silcott]1 - -- - 2