Of all the library's enemies, the most terrible is fire. Water is bad enough; is it not recorded that the 450 copies of the Bible Society's translation of the Gospel of St. Matthew into Manchu, printed on the soft silken paper of China, were destroyed by an inundation of the Neva? But such damage can rarely occur, unless when the element of the Sylph is invoked to combat the element of the Salamander. The muddy waters of the Neva, also, were probably more pernicious than the "salt sea streams" would have been. We ourselves have transcribed manuscripts of Shelley's which had been for months at the bottom of the Mediterranean, and which, although protected by package, had evidently been soaked with salt water. Exposure to fire for a hundred-thousandth part of the period would not have left a letter legible. The librarian's vigilance and resource, accordingly, ought to be enlisted against fire in an especial manner, and no contrivance should be overlooked that seems to afford the least prospect of controlling or mitigating its ravages. On July 17, 1884, experiments were made in the garden of Mr. Bernard Quaritch, the eminent bookseller, with fire-proof cases devised by Mr. Zaehnsdorf, equally distinguished as a binder, and were reported in the _Academy_ of July 26. Three books, each enclosed in a separate case, were put into a fire, and kept there for half-an-hour. On their being extracted, "one, which had been in a case lined with tin, unpierced with air-holes, suffered only in its binding, which had been slightly damaged, not directly by the fire, but only by the heated metal. A second, of which the case was of the usual kind, but also unpierced with air-holes, came out intact. The third, in a case resembling that of the second, but pierced with air-holes of good diameter, suffered most, the fire, and the water by which the fire was extinguished, having both found admission through those punctures, the water being the more deleterious agent of the two. This book was, however, not materially injured. From this experiment it may be concluded that a good case will in almost all instances preserve a book from destruction by fire, that a metal lining to the case is not necessary, and that the air-holes (which experiments of a different kind have proved to be indispensable) should be small and numerous, distributed over the top and front edges, and not only on the top." In 1894, the chief part of the library of Lord Carysfort at Elton Hall, Peterborough, was destroyed by fire, these books only escaping which had been protected by Mr. Zaehnsdorf's cases. On October 3, 1896, Lord Carysfort wrote: "A few of my books which were in cases were quite preserved from serious injury, the cases having been blackened and destroyed, while the book and its binding were scarcely discoloured. Since the fire I have had all my valuable books put into cases such as you make."