This appendix describes the practice of female circumcision in the East Africa region. Burton appears to have based his material on secondary sources, rather than on first-hand experience as some have supposed. The Appendix was translated into Latin to placate the censors, but the publisher thought better and left it out entirely from all but a few copies of the book. Spink & son (1976) estimated that no more than 6 of these were printed, presumably for Burton's personal use. Appendix IV contains 4 pages, on two leaves, numbered as pages 593-6. Most known copies with Appendix IV have only 1 leaf, that is two pages.
The following page images of Appendix IV are provided courtesy of Jeff Moore, who owns an original of First Footsteps with one leaf of Appendix IV.