If he died in 1907 and was buried at St. Vincent's, he would have been buried in the OLD St. Vicnent's Cemetery.
It was located at the top of Cemetery Street (off of State Street) in Larksville. It no longer exists. In the fall of 1911, when the new cemetery was created, the old one was abandoned. Most if not all of the bodies were reinterred in the new cemetery, or else in other cemeteries.
If you tell me the name of your ancestor, I'l try to see if he was buried in the old cemetery in 1907.