From the Shenango Valley Argus, Greenville, Mercer, Pennsylvania, issue of 08 May 1875, page 5:

Death of an Aged Citizen

Mr. David Arner, who died last week in the 98th year of his age, was a remarkable man in many respects. He was born in what was then Northampton county, but now Lehigh, on the 1st day of March, 1778, as shown by his baptismal certificate, which is still in a good state of preservation. His father, Henry Arner, fought under Washington in the Revolutionary war, and the deceased was born while the father was nobly contending for the liberties of his country. At the close of the war, his father left the older settlement, and going to what was then the frontier, settled above Northumberland on the Susquehanna. Here Indian incursions often drove them from their homes. The family afterwards crossed the Allegheny mountains and settled in Westmoreland county, where, in 1798, the deceased was received as a member of the Reformed Church by confirmation under Rev. F. Wm. Weber, and remained true to his profession to the hour of his death. While living in Westmoreland county he frequently carried provision upon pack horses to the settlers of Mercer and neighboring counties, and in this way became intimately acquainted with many roving bands of Indians, who still wandered through this section. Leaving Westmoreland he lived 14 years in Ohio from where he came to Mercer county, where he remained until his death. He was the father of 12 children - 11 of whom are still living.