Tom, you have some old genealogy. Richard Hollis was probably Sarah Hollis' brother, but Richard married Millie Garrett. [Do not rely on early generations in The Doster Genealogy] source for marriage is Georgia Genealogical Society Quarterly, Vol. 12, 1976, p. 253 sent by Ken Thomas [whose work can be trusted]: Hollis-Edge Cemetery, Talbot Co, GA: Hollis, Milly, dau of Daniel & Nancy Garrett and wife of Richard Hollis, 14 Dec 1890 - 7 June 1868, age 77 yrs 5 mos 23 days; Richard Hollis, son of Moses & Elizabeth Hollis, 17 Mar 1783 - 6 Apr 1872, age 89 yrs & 19 days. The Elizabeth Hollis is likely Elizabeth Akin, probably 2nd wife of Moses. There are Doster connections ... Reason Edge 1806-1872 (buried there)was the son of Nehemiah & Elizabeth Edge, and this Elizabeth was supposed to be a Doster. Reason married Nancy Hollis, d/o Richard and Millie.
William Doster was born ca 1732 more or less, but was probably born in Burlington Co, NJ. He married a Margaret ?? in Frederick Co, VA. He did die ca 1783 in Wilkes Co, GA.
Wondering if Nancy, wife of Daniel Garret, was a Doster daughter of William and Margaret???