Arthur is the son of a Harriet Dimmick in the 1900 census records for Marshall Co., WV. He is listed as a surviving brother of Ephraim Dimmack in Ephraim's 1944 obituary. His residence at the time was listed as Washington, Pennsylvania. 2
11900 U.S. Population Census, Wheeling, Ohio Co., WV.
2Obituary for Ephraim Dimmack (Mar 23 or 24, 1944, The Middletown Journal).