FROM the Commissioner of Education's special report on Libraries, we find that our Library has doubled within the last twenty years. Among the many prominent contributors of books was Charles Sumner, who during his lifetime gave to the Library more than two hundred and fifty maps, thirteen hundred volumes, and from fifteen to twenty thousand pamphlets; at his death he gave his own library of nearly four thousand volumes. In 1866, Charles Francis Adams gave a collection of forty-eight volumes printed in Great Britain in relation to the rebellion. The Library also contains one hundred and sixty-eight volumes of manuscripts used by Jared Sparks, the manuscripts and books used by W. H. Prescott in preparing his Ferdinand and Isabella, and nearly six thousand publications collected by Dr. J. G. Palfrey. Among the manuscripts are some dating back to the twelfth and thirteenth centuries, and one written in the ninth century. Since its foundation the Library has been in the charge of sixty librarians.