"How to Make an Index" by Henry B. Wheatley is a practical guide on the art and science of indexing, written in the late 19th century. The book aims to provide readers with both historical context and practical techniques for creating effective indexes, encouraging careful thought on both what to include and how to organize information efficiently." The opening of the book introduces the reader to Wheatley's extensive experience in index-making and sets the stage for an exploration of the evolution and significance of indexes in literature. The author references notable historical figures who have commented on indexing, such as Joseph Glanville and Thomas Fuller, contrasting earlier criticisms of indexing with modern views on its necessity for effective knowledge retrieval. Wheatley expresses the need for proper training in indexing, emphasizing that while anyone may attempt it, true competence requires understanding and skill. The initial chapters outline the development of index-making, introducing fundamental concepts that will be further developed as the text progresses. (This is an automatically generated summary.)