Comprehensive Index to the Publications of the United States Government. (1905) U.S. Congress, House of Representatives. House Document No. 754, 58th Congress, 2nd Session (Serial Set 4745-4746). New York: Johnson Reprint Corp., 1970.
Ames covers the years 1881-1893 and is a subject index to all government documents published during this period. The index has three columns: author or origin of the document in the left, date and description in the middle, and type of report and report number on the right. In order to find a specific report in the Serial Set after it is identified in Ames, the report number needs to be looked up in one of the chronological lists of documents: the 1909 Checklist, CIS U.S. Serial Set Index, or Document Catalogue (but note that the Document Catalogue does not include information prior to 1893).