Resembling a dungeon, this photograph unveils a part of the library tucked away from the general study rooms--the study cells in the West stacks of the library. Though intimidating, these carrels were very popular among students to focus on work while having access to many of the materials they might need. Ph.D. students could rent out these carrels to have a "temporary residence" in the library.
Savitar, 1998. page 55.