Son of John M Mosley and Elizabeth (-----)
Born ca. Oct 1859 in [Kent Co.], Delaware

William's age in the census records: in 1860, age 9/12; in 1870, age 11; in 1880, age 19.
The family appears under the surname Moseley in the 1860 census.
The family appears under the surname Mosely in the 1870 census.
The family appears under the surname Mosely in the 1880 census.

1860 - U.S. Census, Delaware, Kent Co., Murderkill Hundred, Page No. 181 [=181], 1233-1209, 02 Jul 1860
1870 - U.S. Census, Delaware, Kent Co., Dover Hundred, Page No. 66 [=253 verso], 462-457, 28 Jun 1870
1880 - U.S. Census, Delaware, Kent Co., East Dover Hundred, E.D. 36, Page No. 29 [=102A], 179-186, 11 Jun 1880