A glass plate negative depicting a room on the second floor of the Mary Street Y.M.C.A., 1909. Room appears to be set up for a lecture or performance; rows of chairs face a fireplace and mantel at the front of the room. A doorway is visible at right; two chandeliers can be seen hanging from the ceiling. The text "Nov. 04 1 1/2" is etched in emulsion along bottom edge.