I found Agnes McBride listed twice in Boone co, MO Newspaper Abstracts, Vol. 3. Perhaps this will add to the background you have on the family. Thursday, June 27, 1907 Pg. #8: Mrs. E.B. Keesecker arrived yesterday from Cedar Rapids, NE, to visit her sister, Mrs. W.W. Chedester, and mother, Mrs. Agnes McBride. Thursday, August 23, 1906 Pg. #1: Ben Forbis of Centralia and Miss Nora McBride were married in Centralia last Wednesday. The bride is the daughter of Mrs. Agnes McBride, of east of town, and sister of Mesdames P.T. King and W.W. Chedester of this city. They will make their home in Moberly.