The tree is 60 inches in diameter at the 5 foot level, and is in a
residential front yard in Nashville TN. There was a Silver Maple that
shaded it somewhat, but that went down a few years ago in a tornado. By
the chart used from
http://www.learner.org/jnorth/tm/leaf/HowOld.html

I figure if it was in a forest it would be 95 years old. How would I
figure age in a non forest area?

Kate

PS - Thanks for the great book recommendations - I'm about half way
through Forest Primeval and I'm seeing the woods I frequent in a totally
new light! (And I love my Textbook of Dendrology!)