The Georgia Vaughan that I mentioned in my earlier post as S.T. Vaughan's mother, also had a son named Marvin.The 1910 census of Loachapoka, Dee, Alabama, for her family: Household Gender Age Birthplace SELFGeorgia VaughanF 35y AlabamaWidowed SONGeorge W VaughanM 12y Alabama DAUDora A VaughanF 11y Alabama SONMarvin VaughanM 9y Alabama DAUJunie M VaughanF 8y Alabama SONEarly VaughanM 4y Alabama DAUS T VaughanF 3y Alabama DAUAltona VaughanF y 12m Alabama The 1910 census record is here: https://familysearch.org/pal:/MM9.1.1/MK7H-TBT
If some of the other names in this census entry sound familiar, then perhaps the census taker made a mistake in recording S.T.s gender.
A good place for free online genealogical research is www.familysearch.org.For my first search for your ancestors, I simply searched for Mose Vaughn, spouse Lucy.
After learning that they were from Lee county, Alabama, I searched for Rush Vaughn, residence Lee county.
After learning that Rush Vaughn was in the 1910 census at Loachapoka, I searched for all Vaughns in Loachapoka, Alabama.
In that way, you can broaden or narrow your search requirements to try to find the information you need.There are 118 entries for Vaughn in Loachapoka for censuses from 1880 to 1930.You may find other names that are of interest to you.