This from Dan Shevlin:

7100blk St Lawrence Still time: 2208, 2-story ordinary 25 x 70, fire on 1&2, 2 lines. Slight exposure to the building to the south.

Companies: 122, 63, 47, 3310, 326, 248, 555, 274. 

Chicago Fifre Department Truck 30

Dan Shevlin photo