Building no. 89. The Art Annex is now used as an office and storage space. One set of Post Plans designate it as a Telephone Exchange and a Bachelor N.C.O. Quarters. Floor plans have a telephone switchboard, sleeping quarters, and signal corps detachment room crossed out, leaving a lavatory and N.C.O. quarters on the first level. A signal corps workshop and lighting switchboard were shown on the second floor loft. The difference of the second set of Post Plans place the two upper rooms as storage and switchboard rooms. Walls are 15 inches wide. Both plans do not give a date when it was built. It was likely built in 1904, the same time as building 88. Its double doors were once a single door, with a five-step stoop at the entrance. HA...