After the return to Lowestoft, _Result_ was altered in appearance and was sent off to the area where this encounter had taken place. This time she used Swedish colours, and called herself the _Dag_. On this voyage, whilst in the vicinity north of the North Hinder Bank, on April 4, about 4 a.m., a submarine was seen on the port bow, but disappeared. It was so big that at first it resembled a steamer or destroyer. Presently a periscope was seen about 4 points on the bow, resembling a topmast, as it had a rake. The lower portion was about 6 inches in diameter, and a narrower stem protruded from this, terminating in a ball, and whilst officers and crew watched it, wondering whether it was the mast of a wreck or not, it slowly dipped and vanished. This was the submarine in the act of taking a photograph. She then retired to a distance convenient for shelling. There was a light westerly breeze, and the enemy now bobbed up at intervals all round the _Dag_, examining her very carefully. Lieutenant Muhlhauser writes of this incident: ‘Then followed a pause of nearly half an hour without our seeing anything of him. The cook was sent to the galley to get on with breakfast and we started the engine. It is hardly necessary to say that as it was particularly wanted it ran very badly, and, indeed, could hardly be kept going at all. Suddenly a shell burst near us, followed by another and another. We could not at first tell the direction from which they came, and thought it was from astern, but found that the submarine had cunningly moved away towards the sun, and had emerged in the mist behind the path of the sun, where he was practically invisible from our ship, while we were lit up and must have offered a splendid target with our white hull and sails. His shooting was very good, and none of the shells missed us by much. He fired rapidly, and was probably using a 4·1-inch semi-automatic gun. The shells all burst on striking the water, and the explosions had a vicious sound. They seemed to come at a terrific speed, suggesting a high-velocity gun. The C.O. calmly walked the deck, the skipper took the wheel, and I sat at the top of the cabin hatchway and noted the times and numbers of shells fired and anything else of interest. The rest of the crew were at their stations, but keeping below the bulwarks, except those who launched the boat and let it tow astern. The eleventh shell struck us just above the water-line, and soused us all with spray which flew up above the peak of the mainsail. It tore a hole in the side and burst in the sand ballast, reducing the skipper’s cabin to matchwood, and destroying the wireless instrument. It also knocked down the sides of the magazine and set fire to the wood, starting some of the rockets smouldering. It also smashed up the patent fire extinguishers, and possibly the fumes from these prevented the fire from spreading. Anyway, it was out when we had time to see what was happening.