18 DECEMBER 1915, Page 24

The Conquest of the Sea. By Cyril Hall. (Blackie and

Son. 3s. 6d.)—The sea itself and all things in it or upon it are the subjects of this work. The first chapters trace the early develop- ment of shipping, and lead on to the latest yachts, submarines, and lifeboats. Sea-fishing of all kinds and piracy are other attractive matters to describe for boys.--In The British.kavy. Book (same publishers and price) Colonel Field specializes upon fighting ships, of which as an officer of Marines ho knows a great deal. But his field is wide because, like Mr. Hall, he spreads his account over a long period. He begins with the command of the sea in Julius Caesar's days, and traces, with many interesting reproductions of old pictures and drawings, the development of navies through the Middle Ages until he comes to gunnery and armour. The story is brought right up to date with accounts of naval aetions in this war and of the naval air service. These modern descriptions are illustrated with photographs.