From Garth Matthews, History of American Crumplers (his ref J1.4-F12.2#a-4):
1940[US Census] Living with mother & siblings at De Soto Mississippi
1950[US Census] Living at widowed mother's home with wife & child and own siblings
[S90946] Garth Matthews, Matthews, History of American Crumplers, (Unpublished manuscript, sent to Craig Walsh 14 Nov 2026), Ref J1.4-F12.2#a-4, Chapter 4: John Crumpler Snr and the J1 John Jnr line.