David Mosser, son of Philip, was born December 30, 1766, in Lehigh, then Northampton county. He died in Lynn Township, Oct. 18, 1832, aged sixty-five years, nine months and eighteen days. He was a miller by trade, and operated a custom mill and sawmill, at Mossersville, where a post office was established in 1866. David Mosser had 180 acres of land, which he cultivated in connection with his other business. On April 25, 1798, he purchased the farm from his father Philip, who died in 1817. In this year David rebuilt the gristmill, and this is still standing David Mosser was married to Catharine Oswald, who was born April 7, 1776, and. died May 11, 1857. Both are buried on the old graveyard at New Tripoli.

David Mosser was in the milling business about forty years. He was succeeded by his son, Joseph. His land was divided between his sons, John and Joseph.