This from Eric Haak:
These images come to you from the early morning hours of March 25, 1966. This was a 5-11 +1 special at 3951 South Canal Street. The building was owned at the time by the Siegmund Warner Company which produced some sort of sporting goods. The interesting thing is that the larger building that you see the fire building attched to still exists and has been vacant for a while. The 5th image shows a collapse in progress. The 6th image is taken looking north towards Pershing and both of the buildings in the background still stand. The last photo is looking west towards Normal Avenue. Still time is recorded as 0451. Hope you enjoy!