In the 1990s, the sorting was decentralized and each floor got its own sorting area, but third floor still used the large room, which frequently filled to capacity during peak return times.
A few years ago, there was another change, as a new return/sorting area was added in the basement (soon to be "lower level") of the library. From here, books are trucked to the other sorting areas before being shelved. But, the third floor sorting area was still fairly full just a couple of weeks ago.
Now it is empty and much of its shelving will be dismantled in coming days in preparation for demolition of the last remaining "inside" (i.e. behind locked doors) study carrels in the library. Some of the existing area used for the sorting room plus all of the study carrel area will be replaced with shelving to hold the music monographs when the music collection relocates to the new Media Commons on the main floor in February.
So, while I was happy that I got to take some photos of this soon-to-be-gone part of my past, it's a bittersweet happiness, as the photos will be all that will remain by the time I come back from the break in January.