Up at 12.0 AM. & kept middle Watch. Rather cold Watch. Relieved at 4.0 AM. Hands called at 4.15. Arrived Scapa Flow about 4.0.A.M. Started coaling about 5.0. o’clock. Took in 1250 tons from Cedartree. Finished about 11.45.a.m. Put out to sea during dinner hour. Cleaned decks and ran torpedoes in afternoon. Lost one. Sub calibre firing and returned to Harbour.