Two weeks ago, I asked for help with an answer to this question: When did the top of the Milwaukee Road Depot tower disappear?
The generally accepted date, according to Wikipedia, is 1941, after the building had been damaged by wind. But after a bit of searching, I couldn't find the date. It seemed a bit of a mystery.
Thanks go out to the many readers who called, texted and e-mailed me about more than just the fate of the tower topper. We now know more about the rich history of the once-loved cupola.
Several readers wrote to say that before the 1941 wind storm, the tower suffered a fire, specifically on May 1, 1938. According to the Minneapolis Star, the fire "failed to force Mrs. Alice Riggs, 2537 33 Avenue S., from her switchboard on the third floor just below the blueprint room, where the fire started. She donned fireman regalia and held her post."
The blaze was "quickly extinguished," and while it did cause $5,000 worth of damage, it wasn't the reason that the tower lost its top.
Erik Johnson, keen in the ways of historic building permits, found references to the tower in Hennepin County Library archives. According to Card #303, "American Lbr. & Wrgs. Co." got a permit to take down the top on a "pass. depot" for the grand sum of $2,000. The permit was issued on May 12, 1941.
Tom Murphy did some searching of his own, using variations on the Milwaukee Road name, and found a story from the May 29, 1941, Minneapolis Morning Tribune:

"For northbound travelers on Third Avenue S., who have been wondering what's wrong with the loop skyline, here's the answer. The top of the tower on the Milwaukee station has been torn off, and is being replaced. The old ornamental copper top, underpinned with wood, has been exiled to the weather since 1898, and rotting of the wood had made it insecure."