White Duplex Homes, 521 West Arthur Street, Bozeman MT, just a bit over three blocks directly East of Montana State University’s Montana Hall.
As already mentioned in a previous photo Concerning Clark Apartments, Sarah had her, US Mail Address made up into a rubber-stamp device, meant that she considered both the her address there to be ~ long term. Similar to Clark Apartments, a second rubber-stamp-address shows 521 West Arthur Street, just a bit over three blocks directly East of MSU’s Montana Hall. It would seem probable that Sarah, would choose this address (actually at the very edge of MSU Campus), since in her later years she was getting older, and had difficulty walking. Putting together all know facts about Sarah’s living quarters, it is most logical that Sarah lived here, sometime during her years after her return from Ft Collins to Bozeman. These years would be from 1945 up to ~1968, when she moved to Florida, to be with her sister. … Current day Google Map pinpoints the 521 West Arthur Street location, where Google Street View (GSV), reveals a white duplex. Of the several GSV perspectives available, the best view shows the duplex front, where on the steep roof, are two (matched size), sharp pointed dormer roof peaks, below which, two entry doors, are over white concrete steps: These are the sidewalk entrances, for each half of the duplex. A rotation of the GSV image, shows the duplex is on a corner lot, at the intersection of, sure enough as seen on the two green sign, “Arthur St” and “S 6th St”. Mr Gary, was emailed the best links for 4 GSV perspectives, with sentences of his 2009 memories saying “duplex” an “Arthur Street”, and asked look close again. He replies “Again, I am uncertain, but it does resemble the duplex I mentioned.”
Click the photo several times to get the largest view. Then use Click-Drag-Bars, to see upper right, where you can click on the >> to get the next photo view.

This is the best Google Street View, of the front of this White Duplex. This view and many others, may be explored at the link
https://www.google.com/maps/@45.6682109,-111.045212,3a,75y,24.03h,80.96t/data=!3m6!1e1!3m4!1sEZUUD4Ee6xGns8lj0hHzOg!2e0!7i13312!8i6656

File = GoogStVu DuplexHome 598Sb521W.ArthurSt BozemanMT BestAngle