Was wondering about that myself...mighty puny for a 200+ year old tree. I see pictures of 'Indian trail trees" and such in magazines....I know down here in the south its rare for something besides an oak or cypress to survive that long. Even those long lived trees are ravaged by storm and drought and rarely make it. Still if the tree is old I am certainly glad you were able to save it from the saw. Would have been a shame for it to be lost.
Here is a photo of a Post Oak....this is growing in my front yard and this year got the distinction from the forestry people as the largest Post Oak in the state of Louisiana. My family has owned this place since 1843 and the tree was growing there at that time. My grandmother who was born in 1902 said when she was a girl there were twin oaks in the yard, but on succumbed long ago.
Had an old fellow who does treasure hunting come by and look at it...he could see all sorts of treasure symbols in the tree....lol I think that was imagination and nothing else...my family was always dirt poor so no pots of gold floating around there.