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John Schell, born 1858 Pa maybe the son of Thomas and Mary Schell, married Margaret Dalrymple, born 1859 Scotland, daughter of Thomas Dalrymple and Elizabeth Anderson.
It is believed that John and Margaret Dalrymple Schell raised Karl Clark (uncle to Esther McDermott) after his mother, Clara Mae Shell Clark died in childbirth.
From the 1910 Census, Sharpsville, Mercer Co., PA ED#180 visit 621:
John Shell head age 52 b. PA
Margaret wife age 51 b. Scotland
Karl R. son age 6 b. PA
Glen G. Holland SIL age 25 b. PA
Jessie M. Holland dau age 27 b.PA