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There are other topo maps out there that are accessible online, including this one: Get Maps | topoView (usgs.gov)
Click anywhere on the map it and will show the detailed maps that are available off to the right. Click on the one you want to look at, and once the map pops up, you can zoom in on it.
The Ft Douglas 1950 map (just to the north of the U of U) is good, as is the Sugarhouse 1954 map. The Sugarhouse clearly shows St Mary's on the map. Reed's street is unmarked, but it is on the map, located approximately 1.25 miles dead west of St Mary's....
Have you ever tried this method of map searching?
LINK:
How To Map Dowse | Canadian Society of Dowsers