University of South Dakota campus view in 1910.

I found this great birds-eye view the of the USD campus in the Bulletin of the University of South Dakota, Announcement of the College of Medicine 1910-1911 (July 1910), Health Science Archives W 19.5 AS8 U58c. Notice how the main buildings make a u-shape.

University catalogs (which were sometimes published as part of the Bulletin of the University of South Dakota series) are a good source of campus maps and drawings.