I am researching Mehesy's theater which is now the Off Broadway Theater on 272 Main St., SLC, UT. I have a picture of Main St. in the 1900s with Mehesy's theater in that location. This site doesn't mention it, so far and starts out with the Rialto in the Clift Building built in 1920.
Another site starts out with Mehesy's in 1915, closing in 1918, and reopening as Rialto...