The collection is arranged in five series.

Series I: Academic Papers includes Hoppenstein's collegiate papers from 1933 to 1937. Some materials are undated. A majority of the collection dates to 1936 and focuses on equestrian studies. Aside from test booklets, notes, and assignments, Series I also consists of administrative materials such as report cards and professor memos.

Series II: Correspondence includes the Hoppenstein's personal and academic letters. Included in the series are Hoppenstein's VPI acceptance letter from 1933 and an alumni newsletter from 1939. Altogether, the series dates from 1929 to 1939, but some items are undated and most are from 1936.

Series III: Newspapers contain whole newspapers and clippings from 1935, 1936, 1938. Only one clipping is undated. All materials seem to have been taken from the VPI campus newspaper.

Series IV: Photographs houses a collection of group photos of cadets in a various dress--e.g. formal uniform, athletic gear, etc. The series also contains dozens of individual portraits of cadets. All photos are black and white and undated. On the back of some items is caption indicating where Hoppenstein can be found in the photo.

Series V: Publications consists of bound and published material from 1925 to 1940. One item--a German Club party program--is undated. Materials relate both to academic and leisure affairs. Notable items include VPI course catalogs and psalm book.