The update to this particular story relates to some articles reguarding the area of town in which I lived when I, being half-awake, saw this fellow.
Firstly, being that I was living on the corner of Fort Lowell and Swan at the time... which is to say, I was living less than a mile away from Fort Lowell.... I was rather stunned to learn that in the 1900's Mexicans living in the immediate vicinity of the Fort also reported seeing the ghost of a soldier. I make no claims that these stories are true-- for all I know it could have been a squatter in lieu of a ghost-- but the stories are quite amusing to read reguardless. I've only scanned and uploaded a few, but there are plenty more...
The stories begin in December 14,1900 and were covered by the Arizona Daily Citizen-- which later became the Tucson Citizen... and, which is no longer a paper as of May-ish 2009.
Some fun reading for y'all.December 14, 1900 paper-- front page
Other Stories about the Ghost:
From Dec 28, 1900
Here's one where the ghost was shot at....
Anyway, more amusing than these stories is the fact that when I describe the ghost as a "Cowboy"... he looks a lot like how a US Calvary soldier would have looked in the 1800's.... which is something like this photo, taken Jan 2010 at Fort Lowell Days:
The coincidence of these events is rather compelling... though, I wouldn't go so far as to say I saw a ghost since I was technically still mostly asleep when I almost ran into whatever... but even in that state, I have to wonder why all my sensory perceptions would suggest that "something" was there...?