Lumus Harris died Feb 9, 1947 in New Willard, Polk County, Texas. He is in Polk County, along with wife Eugenia, in the 1930 and 1940 census records. I have not looked at these two census records in detail, but there appear to be more children by Eugenia. There may well be children from the earlier marriage close by. www.familysearch.org
has a lot of Texas Death Certificates. Lumus does have a death certificate on the site.