Page:Essays in librarianship and bibliography.djvu/91

admirable suggestion, made independently in 1849 by Mr. Wilson Croker and Mr. Roy, of the Library, that the entries, instead of being written upon the leaf itself, should be written upon movable slips pasted upon it, so that insertions might be made without any disturbance of alphabetical order. The suggestion was promptly adopted, transcribers were engaged to copy the great mass of accumulated titles, and, all thoughts of printing the catalogue commenced in 1839 being laid aside for the present, the titles prepared for it were also transcribed and incorporated with those written for the books newly acquired. In 1851 this new catalogue, transcribed fourfold by the "carbonic" process, and with copious space provided for insertions and interleavings, was placed in the Reading Room in 150 volumes, or about as many as are now occupied by letter B alone. The catalogue of 1839 and the supplementary catalogue were thus put into a fair way to become one, and it became obvious that printing must be deferred until the amalgamation was complete. It was still, however, a fair question whether the catalogue might not be kept up in print; whether it was better to transcribe titles fourfold as we did then, or to multiply them indefinitely by print as we do now. I cannot find that the practicability of keeping up a continually augmenting catalogue in print was seriously considered, until, in October 1861, it was proved by the introduction of print into the University Library of Cambridge. Some years afterwards the system was strongly pressed upon