Way before the existence of the large online library catalogues we are now familiar with, libraries users would have had to visit a library to find if it held the material they were interested in, or they might be able to consult a printed catalogue. Today, these printed catalogues are valuable to researchers and librarians interested in what libraries used to have on their shelves and how the library’s contents changed over time. They tell us about former library management practices and collection development. They offer an insight into what was considered appropriate reading material. Where libraries no longer exist, historic catalogues are important witnesses to how knowledge and information circulated among communities. They are occasionally also a source of information about who could use the library and on what terms.