Location and hours, of course.
Especially important: the rules for using the Reading Room and the archival materials, photocopy and reproduction services, and more.
The online link above goes to the American Antiquarian Society Periodical Collection.
In physical form, the Raynor Archives has Harper's Weekly from 1857-1904.
Call #: AP 2 .H32. See the MARQCAT record for more detail.
Marquette alumnus (B.A. '32, M.A. '37) who served as a foreign correspondent in Europe for the Associated Press from 1937-1976. Most notably, Shanke worked in Berlin, Germany, from 1937 until the outbreak of war between Germany and the United States. Some online content for the years 1937-1942.