Hello, you did not mention the state for the 1920 Census I assume it was in Arkansas. I found a Joe Robison in the 1920 Census living in the town of Richland, Co. Crawford in the state of Arkansas along with his wife May and there 5 children ages 3 to 16. In the 1940 Census she is a widow. On the census Joe Birthplace: is listed as ARKANSAS not IRELAND and his Mother's and Father's Birthplace as ARKANSAS, Joe may not have remembered his parents from Ireland or because of his bad experience with the farmer who mistreated him he just decided to adopt Arkansas as his Birthplace and his parents - Robison - also.
I believe the following information is for the death of Joseph Robinson Oct - 10 - 1926 see Link:
http://search.ancestry.com/cgi-bin/sse.dll?indiv=1&db=AR... As for their marriage the link below will take you to a list of a possible two matches even though they were performed in a different county,
Link:
http://search.ancestry.com/cgi-bin/sse.dll?db=FSArkansasMarr...=
Tim