"Manual of Library Cataloguing" by J. Henry Quinn is a professional guidebook written in the late 19th century. The book is intended for librarians and those involved in the cataloguing of library collections, offering practical advice and established rules for creating effective catalogues. Its primary focus is on the principles and methods applied in the cataloguing process, emphasizing the necessity for clarity and accessibility for library users. At the start of the manual, the author presents the misconceptions surrounding library cataloguing, noting that many people underestimate its complexity. Quinn stresses that a well-organized catalogue is crucial for any library's effectiveness, arguing that even a mediocre collection can be valuable if properly catalogued. He outlines the evolution of cataloguing practices, particularly highlighting the dictionary catalogue format and its benefits, including its ability to present comprehensive information in an easily navigable form. The introductory chapter sets the stage for the subsequent sections that will delve deeper into specific cataloguing practices and guidelines. (This is an automatically generated summary.)