the Highlands, far removed from theatres and moving-picture houses, would have been a serious one had it not been for the cordial co-operation of the people. The spirit manifested during our entire stay was evidenced on the Fourth of July, when all the shops and business places closed in honour of American Independence Day and the whole community for miles around joined our sailors in the celebration. The officers spent such periods of relaxation as were permitted them on the excellent golf links and tennis courts in the adjoining country; dances were provided for the men, almost every evening, the Scottish lassies showing great adaptability in learning the American steps. Amateur theatricals, in which both the men from the warships and the Scottish girls took part, cheered many a crew after its return from the mine-fields. Baseball was introduced for the first time into the country of William Wallace and Robert Burns. Great crowds gathered to witness the matches between the several ships; the Scots quickly learned the fine points and really developed into "fans," while the small boys of Inverness and Invergordon were soon playing the game with as much enthusiasm and cleverness as our own youngsters at home. In general, the behaviour of our men was excellent and made the most favourable impression. These two mine-assembly bases at Inverness and Invergordon will ever remain a monumental tribute to the loyal and energetic devotion to duty of Captain Orin G. Murfin, U.S. Navy, who designed and built them; originally the bases were intended to handle 12,000 mines, but in reality Captain Murfin successfully handled as many as 20,000 at one time. It was here also that each secret firing device was assembled and installed, very largely by reserve personnel. As many as 1,200 mines were assembled in one day, which speaks very eloquently for the foresight with which Captain Murfin planned his bases. III But of course baseball and dancing were not the serious business in hand; these Americans had come this long distance to do their part in laying the mighty barrage which was to add one more serious obstacle to the illegal German submarine campaign. Though the operation was a joint one of the American and British navies, our part was much the larger. The proposal was to construct this explosive impediment from the Orkney Islands to the coast of Norway, in the vicinity of Udsire Light, a distance of about 230 nautical miles. Of this great area about 150 miles, extending from the Orkneys to 3 degrees east longitude, was the American field, and the eastern section, which extended fifty nautical miles to Norway, was taken over by the British. Since an operation of this magnitude required the supervision of an officer of high rank, Rear-Admiral Joseph Strauss, who had extended experience in the ordnance field of the navy, came over in March, 1918, and took command. The British commander was Rear-Admiral Clinton-Baker, R.N.