Alexandre died in Biddeford in 1942, and is buried at St. Joseph's Cemetery in Biddeford. He was living at 90 Elm in 1941. Zepherine died in 1952, and is also buried at St. Joseph's. She was living at 18 Maple in 1951.
Here is the Catholic Diocese of Portland cemetery index where I found the burial information: http://www.portlanddiocese.net/genealogy_main.php
The city clerk should be able to find the exact dates of death easily: http://www.biddefordmaine.org/index.asp?Type=B_BASIC&SEC...