Houghton Mifflin, Boston & New York, 1917. First edition, American issue; 8vo, pp. [2], 93, [3]; folding color map of the world, 5 charts (1 folding, 2 double-p.), 15 plates; fine, bright copy in near fine jacket. Account of the exploits of the British Navy in World War I.  The battles, blockade tactics, submarines, bombardment and keeping open the sea lanes during World War I.