From an account of the work of the British Navy in the war there must not be omitted some exposition of the gallant doings of the men of the Royal Naval Air Service. They have made their mark in the war, in every theatre of it, and no one can tell what part they will play before the struggle is at an end. Of some of their work very little is known. They render “silent” service, like that of the Navy to which they belong. They do not always carry on their duty alone. On occasions they participate in that of the Royal Flying Corps of the Army. They have been associated with the gallant French airmen, and the Americans come with a new burst of energy. The Germans know British naval airmen at Zeebrugge and Ostend, and in all the country behind those places; at sea also, when the German raiders return from their exploits; and on the West front of the Army, too, where they go at times far behind the line, spying out the land, taking number and note of the enemy, dropping bombs on his store and ammunition dumps, disturbing all his rearward services, and stirring up his aerodromes and the nursing places, where his fledglings, whom they call “quirks,” are taking to themselves wings and learning to fly. [Illustration: A FLEET MANŒUVERING AT SEA] [Illustration: THE CAPTURED GERMAN SUBMARINE MINE-LAYER UC5] The Royal Naval Air Service has lent its aid to the Italians, has provided unpleasant experiences for the Bulgarians, has dropped bombs on the Turks at Gaza and thereabout, has rendered good service in the Mesopotamian business, and was invaluable in “spotting” for the guns which destroyed the fugitive German cruiser _Königsberg_ in the jungle-clad reaches of the Rufiji River. From dawn to dusk these knights of the air have been flying in many parts of the world, and night-flying is their particular pleasure when there is great work to be done. Their “game book” is very full of astounding episodes of fighting which, in exciting experiences, put into the shade the thrilling narratives which for generations have delighted the hearts of boys. Few people know the sleepless vigil which the naval airmen keep all round the British coasts, constantly flying to keep watch upon the enemy, to spot his submarines, to discover his mine-fields, and to defeat any efforts he may make when transports are moving at sea. Such is an outline of the occupations and duties of the Royal Naval Air Service.