I was going to check the Mass Vital records for any death entries. About when was he born and where? The family on the 1900 census did they use the surname Mello or Silva? It appears there is quite a large population of da Silvas and da Mellos from the Azores.
I would have to say that I am extremely jealous! I would take Vog over mundane desert anyday. If you do come up with possible family links let me know. Perhaps we could find the family he was visiting in the Mass vitals.