Thomas was born Islandmagee about 1861-62, Confirmed by Census records, note spelling Higgins and Heggins.
Family stories had that he was torpedoed 3 times. Actual sinking of Tara confirms 3 topedoes fired to sink her.
I am only guessing at Queen Mary, as timing seems to match and no mention of him later, and death of William lists Thomas as "late" in 1918.
When comparing various Hagan/ Heggen/Heggan census from Islandmagee with cemetery records, shows lots of "swapping" of spelling. I have cemetery records for Heggen, but both 1901 and 1911 census show as HAGAN. I was hoping someone has already identified this and worked out a solution?