Wow, that was amazing -- thanks, Wayne! I just read the obit. Sad that "Bob" died young, and just four years after that photo was taken.
There's an eerie similarity to my maternal grandfather's death, at age 46, also in 1934, and also due to his service in WWI. He was exposed to nerve gas in the trenches, and later developed pleurisy, which killed him.
I'll follow up on your other leads, too, and I think I'll add the family to my tree, to see if it hooks up with anything more via hints, etc, and to post the photo.
Thanks also for alerting me to that Old Fulton NY Post Cards site, since I think it may have a lot of other useful news items for my research.