This collection consists of 46 engraved portraits, 2 engraved other illustrations, 1 photographic print and 22 textual documents inserted into William Van R. Whitall's copy of Horace Porter's Campaigning with Grant. The textual documents are either manuscript or partially manuscript and partially printed. Each of the portraits is of a prominent leader mentioned by Porter at some point in the text. Although the textual documents vary in form, function and scope, each document contains an autograph signature of some person mentioned by Porter in his text, and appear to have been collected by Whithall for the significance of their autographs rather than for other content. A few documents are slips or leaves with only an autograph signature and nothing else. Most, however, are items originally created in the course of personal, military or other government activity and consist of short notes accompanying or explaining other corrrespondence that is not present with this volume, and sent by or received by Horace Porter and other former members of Grant's military staff who served along with Porter as Grant's secretaries during the period of Grant's presidency, such as Frederick T. Dent and Orville Babcock. Documents from other persons include those from John C. Kelton, Cyrus B. Comstock, William Averell, Benjamin Butler, Rufus Ingalls, David Dixon Porter, and others and originate from their military service, civilian goverment service, business or personal correspondence. Engravers whose work appears among the portraits include several who were prominent in the northeastern U.S. during the late nineteenth century, such as Alexander Hay Ritchie, John A. O'Neill, John Chester Buttre and others. Some of the documents described in the 1927 American Art Association auction catalog as inserted by Whitall were not present in the volume when it was acquired by USMA Library in 2023.