During March the weather at the northern bases was not very boisterous, but a great deal of mist and fog was prevalent during the first fortnight, and during the last fortnight snow fell on at least seven days. An average of fifty-six ships per week was intercepted by the ships of the 10th Cruiser Squadron during the month. During April, 1915, intended Fleet movements were prevented on several occasions by bad weather, and the 10th Cruiser Squadron and other ships at sea experienced exceptional gales; the principal movements carried out were as follows: From the 5th to the 8th the 3rd Battle Squadron, 3rd Cruiser Squadron and five destroyers of the 1st Flotilla cruised in the North Sea (central portion), and from the 5th to the 9th the Battle Cruiser Fleet with eight destroyers of the 1st Flotilla cruised in the northern portion of the North Sea. On April 8th the _Lancaster_, of the 7th Cruiser Squadron, and the _Caribbean_, of the 10th Cruiser Squadron, were detached to watch the Norwegian coast between Lat. 62 and 64 N. On April 11th the whole Grand Fleet proceeded to sea; the Battle Fleet met the Battle Cruiser Fleet and 3rd Battle Squadron from Rosyth, and cruised in the centre portion of the North Sea during the 12th and 13th, returning to the various bases on the 14th to fuel. The opportunity was taken of carrying out battle exercises. Whilst the Dreadnought Battle Fleet was passing down east of the Orkneys at 2.30 P.M., and was being met by the 2nd and 4th Flotillas, which had come out to screen the ships in, the _Neptune_ reported having sighted a submarine’s periscope, but as the Fleet was steaming at 18 knots and the destroyers were taking up screening stations it was not considered that successful attack was probable, and the Fleet held its course for Scapa. Submarines were also sighted during the day by the _Antrim_ in Lat. 57.18 N., Long. 1.2 E., and by the Battle Cruiser Fleet in Lat. 58.15 N., Long. 2.40 E., but no successful attack resulted. The Grand Fleet proceeded to sea again for a sweep in southern waters on the 17th, and at 8 A.M. on the 18th the Dreadnought Battle Fleet, with the 1st, 2nd, and 7th Cruiser Squadrons looking out ahead and the 2nd and 4th Flotillas screening, was in Lat. 57.25 N., Long. 1.4 E., steering at 18 knots’ speed for a position in Lat. 56.30 N., Long. 3.30 E., where it was intended to meet the 3rd Battle Squadron and 3rd Cruiser Squadron from Rosyth.