On his Loafer's Glory radio program, Utah Phillips played John O'Connor's song titled "Triangle Fire" (lyrics posted by John above). You can find the recording on this link (right-click to download - the song is about 21 minutes into the program. If that link doesn't work, try this menu.

You can find "Triangle Fire" and other information about John in Joe Glazer's autobiography, Labor's Troubadour (University of Illinois Press, 2001), page 250