Benkelman/Horne/Clark Family Marker This is what is engraved on the back of the headstone of William and Mary Jane (Clancey-Benkelman) CLARK. It marks not only the burial place of Leonhard Benkelman and his wife, Jane McCormick; but also of presumed son-in-law John E. Horne and grandson, Willie Horne. The lot itself was purchased by John E. Horne. Leonhard Benkelman's step-daughter, Mary Jane Clancey, married first a HORNE and later William Clark.