Yes Clint
It is a Glenn Martin aircraft alright.
It seems it is listed under a large number of titles.
The original photo was located within the Sikorsky archives some years ago, and has been published before.
When I saw it first it was called the Martin Military Scout located at Griffith Park, Los Angeles 1914.
Another photo of it (also at Griffith Park) in 1913 where it is called "armored" tractor biplane.
Finally it seems to be lumped together with other Martin tractor aircraft built pretty much at the same and just called Martin type T.
The US Signal Corps was totally uninterested in this particular aircraft (not even mentioned by Casari) even if some sources claim it was built for a US Army specification for an armored plane....
However Martin improved his aircraft and sold quite a few later tractors under the titles of type TA and TT to the Signal Corps, but that is called development....
Cheers
Stig