The north galleries on the upper floor are divided lengthways, from east to west, into two portions; that now containing Zoological Collections (No. 22 to 26) can be advantageously appropriated to the Department of Printed Books when required. The volumes placed there can be easily lowered down and returned through a hoisting apparatus to be placed at either the south-east or south-west corner of No. 24, immediately above No. 41 on the ground floor—the nearest point of any in the main Library to the Reading-Room. By these various alterations space would be provided for about two hundred and fifty thousand printed volumes, in addition to that which still remains available in that department, from which, however, space for about fifty thousand volumes would have to be deducted, as will be presently shown. [Sidenote: WANT OF SPACE IN DEPARTMENT OF MANUSCRIPTS.] Although there is now space remaining in the Department of Manuscripts for the accommodation of twelve thousand volumes, and although the annual average increase of manuscript volumes may be safely reckoned at less than six hundred and fifty, your Committee have, nevertheless, felt that prospective increased accommodation should now be provided, not only for the Collection of Manuscripts, but still more for artists and readers who have occasion to refer to select manuscripts, as well as for assistants, of whom two, together with one attendant and eight readers, are pent up in a space of thirty feet by twenty-three, crowded with tables, chairs, &c., which scarcely allow room for moving from one place to another or for access to the officers’ study on each side. The Head of the Department of Manuscripts has recently represented to the Trustees his want of six assistants; but he has, at the same time, been obliged to state that, if appointed, he should not know where to place them. The Trustees have complied with his request, to the extent of granting two new assistants; and he will experience great difficulty in placing the two who are to be appointed. Add to this, the interruption to which each of these persons is unavoidably liable from each of the others in the performance of his duties and occupations, owing chiefly to the narrow space in which they are confined. [Illustration: BRITISH MUSEUM. PLAN OF THE UPPER FLOOR WITH THE PROPOSED ALTERATIONS. ] On account of its locality, the Department of Manuscripts cannot derive any direct advantage from the removal of the Natural History Collections; no space which will thus become vacant can be rendered available for the purpose of remedying the inconveniences here stated. As, however, the Department of Printed Books obtains the additional accommodation before mentioned, a portion of the space now occupied by Printed Books, very conveniently situated to supply the wants of the Department of Manuscripts, ought to be transferred to this department.