Although Harry Gidney Aldis spent most of his career as an academic librarian, in latter years with great administrative responsibility in the Cambridge University Library, he is remembered for a pioneering bibliographical study of early Scottish printing. This study provided the basis for his work known simply as "Aldis," his reference volume detailing all the books that he learned had been printed in Scotland before 1700. He thus belongs to that elite group of bibliographers whose surnames have become synonymous with a body of work in a field that is identified with them. Aldis's A List of Books Published in Scotland before 1700 (1904) became the essential chart for the research of generations of scholars, bibliographers, librarians, and booksellers. It also set the fashion for a series of short-title catalogues that revolutionized academic bibliography in the twentieth century and prepared the way for a series of similar works that were of...