In this paper the author reported the progress made by the committee appointed to select and purchase a series of chartagraphic works for the library of the Royal Society, and the means adopted for their arrangement and classification. The collection already comprises 534 separate sheets of the best existing maps, chiefly of the several countries of Europe, but embracing the survey of India, in so far as published. The maps are placed in cases resembling volumes, so indexed as to admit of being indefinitely extended, and easily consulted. Specimens of the different works were exhibited, and the author presented a rapid sketch of the progress of surveying and mapping, from the sixteenth century to the present time.