Burkhard Mosser Sr., came from Germany and arrived in this county about 1727 or earlier. He owned land in Schuylkill (then Northampton) County. Burkhard Mosser, Sr., tradition states was married to an Oswald. He was one of the pioneers in Lynn township, Northampton (now Lehigh) county, in which district, on Dec. 22, 1748 one Simon Moser took out a warrant for 203 acres of land; again on Nov. 19, 1766 he took out another warrant for thirty-three acres in the same township. Michael Moser. June 8. 1754) took out a warrant for fifty-four acres in the same district.

On Dec. 13, 1785. Erhail Seisloff and his brother George, only surviving children and sons of George Seisloff, who with his wife and five or six children in 17571 were massacred by the Indians, sold unto Burkhard Mosser, of Lynn township the farm, which belonged to their parents, for the consideration of five hundred and fifty pounds of current and lawful money. The said tract of land was situated and bounded as follows: Beginning at a white oak thence by land of Jacob Kistler and George Kistler and Paul Hertzog, west ninety-one perches crossing a run to a chestnut oak, north seven degrees, west ninety-six perches to a stone, the land of Philip Sittler, south one hundred-and eighty-nine perches crossing a run to a post, thence by land of Henry Finck, and Frederick Sechler, east one hundred and eighty-four perches crossing a run to a chestnut oak thence by other land of the said Burkhard Mosser, etc. This is conclusive proof that tradition is correct in stating that Burkhard Mosser. Sr., lived where aged Jacob Mosser, a descendant, now lives, on the public road leading to Lynnville. The deed to which reference is made above was witnessed by Peter Kohler and Burkhard Mosser, Jr., each of whom wrote his name clearly on the deed, the original copy is still in possession of the present owner. James R. Oswald; of what is still locally known as the Seisloff homestead.

Burkhard Mosser died in 1807 leaving a family of six children, viz.: Philip, Michael, Jacob, Burkhard Jr., Anna Maria m. John Oswald, Barbara, m. a Mr. Sillier.