I wonder how many magazines that guy was carrying? If he killed 37 it was at least 5.
He fired 80 rounds and two magazines come in the pouch. Whether they had additional pouches or less than the two is unknown.
I still wonder if this hero is still with us. He retired as a Navy Commander.
The letter at the link indicates that the pilot, LT(jg) Dick Barr, whose 1911 it was, reloaded magazines for PO Thomas, since his thumb was injured and he could not reload them himself. Sounds like they had at least two, but could have been only one, if Barr was a really quick reloader.
The letter also states that Thomas fired about 80 rounds, and speculates that some of the dead or wounded VC were moved away by their comrades, the 37 was just how many dead VC there were when the rescue troops arrived.
The article said that the wounded helo pilot was loading magazines for him.