the entire undertaking was premature. The unfortunate determination to print letter A before the whole catalogue was ready, excluded a considerable portion of letter A itself. As other letters were proceeded with, it was inevitably discovered that numerous books which in the old catalogue had been entered under headings commencing with other letters required to be brought under A, according to the new rules. Cross-references under A were continually springing up, of course too late to be printed. In fact, however, the publication of a printed catalogue at that time was inexpedient for a more weighty reason. The Library was too deficient in most branches of literature to deserve one; and it was not until these deficiencies had been remedied by the unexampled exertions of Mr. Panizzi, that an exact register of its contents could be contemplated with satisfaction.
While discussion respecting the printing of the Museum Catalogue was proceeding, the character of the catalogue itself was undergoing modification. Great additions were daily being made to the number of books. The new entries thus rendered requisite were at first made in the old manuscript catalogue of additions interleaved with the original printed catalogue of Sir Henry Ellis and Mr. Baber. Two alphabetical series of titles, one printed and the other manuscript, were thus comprised within the same volumes. The amalgamation of these two sets of titles, and the consequent absorption of the catalogue commenced in 1839 into a more extensive general catalogue, was effected by the ingenious and
