Detail of Ducts thru' Telegraph Office, Schemes A & B (103M & 104M), 4/6/1928
2 drawings (25-3/4x29-1/2 & 25-1/2x30 inches)
Drawer 12, Folder 4
2 drawings (25-3/4x29-1/2 & 25-1/2x30 inches)
32-3/4x48-1/2 inches
32-1/4x36-3/4 inches
Ink-on-linen drawings with pencil notations, 31-1/4x49-1/2 to 32x50 inches