I hope you don't get two messages. I started typing and the other disappeared.I found a couple of your Pursers in the LDS site as follows:(www.familysearch.org/Eng/Search/frameset_search.asp)
Lucius PURSER Birth Date: 29 Jan 1902 Death Date: Feb 1985 Social Security Number: 454-10-1769 State or Territory Where Number Was Issued: Texas Death Residence Localities ZIP Code: 72764 Localities: Bethel Heights, Washington, Arkansas Springdale, Washington, Arkansas
============= Hilton PURSER Birth Date: 7 Nov 1931 Death Date: 31 Jan 1996 Social Security Number: 426-68-9266 State or Territory Where Number Was Issued: Mississippi Death Residence Localities ZIP Code: 39564
There are lots of David's.
From here you might try the Copiah County Census Records and also post on the Copiah Co. Forum and Johnson Forum. ftp://ftp.us-census.org/pub/usgenweb/census/ms/
Have fun, it's addicting! jane (firstname.lastname@example.org)