 He moved back to Dublin for about 6 months before going back to the US in 1940 where he used his last known address which was c/o McBride, 5320 Dorchester Avenue, Chicago, Illinois suggesting he may have been drifting or at least not settled or didn't want to be tracked by family.The last contact he had with the Department of Defence was January 1940 and his last pension payment cashed was in June 1941.After that he is unaccounted for.