Looking at maps, I think Milner and Legget were the ancient dorms. Bolton was
always a classroom/office building, my error.
Walton is not the type I meant. Walton has several ground floor level doors
that lead to the stairs for all four floors. Those doors are 40-50 feet apart.
Walton has windows front and rear, and no interior air well.
https://reslife.tamu.edu/options/halls/walton/
Milner and Leget had that odd, turn-of-the-last century building style, where
the lowest floor was a half basement, and the main floor was up a set of half
stairs. It had three doors together, and I think each door lead to one of the
top three floors. The lower level had a set of doors under the stairs. There
were two (I think) interior air wells, meant to provide ventilation.
I thought that both had been gutted and converted to offices. Apparently,
Milner was, but Legett is a dorm, though, judging by the photos, it was
probably gutted and rebuilt, too.
https://myaggienation.com/campus_evolution/building_history/milner-hall/article_2972eb0c-1180-11e3-a953-0019bb2963f4.html
https://reslife.tamu.edu/options/halls/legett/