American Libraries before 1876

Found this via LISnews.
The Davies Project: Databases Want to find libraries that existed in America before 1876? Try this database at Princeton University.

Listings for Oklahoma includes:

Location: OK Indian Terr. Name: Camp Supply Post Library Type of Library: Garrison Founded Date: 1869
Location: OK Indian Terr. Name: Fort Sill Post Library Type of Library: Garrison Founded Date: 1868
Location: OK Indian Terr. Name: Tallequah National Council Library Type of Library: Territory Founded Date: 1869

If you have additional information on any of these libraries you can also add comments to the entries. So do any of these libraries still exist?