I found my mega resource page here !
Cooley is at #122, but apparently hasn't been scanned yet.
His General Principles of Constitutional Law in the United States of America is at #123.
Here's The Thomas Cooley Law School with several of his writings as well.
(I'll have to check back on the thread later...if I don't feed my crew pretty soon, I think they may riot! :) :)
And I paid $75 for a used copy... :-)