- his death (1936-09-01) in Erie, PA
- his marriage to Valentine Barber.
- rumors his military service in WW1.
I found a picture of his tombstone here.
Note the military unit: 12th Engineers, Company C. So, a bit of poking around and I find a site with a complete roster of the 12th Engineers in WW1. Oddly, not one Mahoney in the battalion... but here I found a reference to Daniel R. Mahaney, Company C, of 722 Rosedale Ave, Erie, PA.
So, now I have an alternate spelling and address to work.
Let me know if you find any further leads.