Germans capture Island of Dagö, Gulf of Riga; 1,200 prisoners claimed. Raid by 10 or more airships on London and north-east counties; one drifts over London with engines shut off and drops three bombs; 27 killed and 53 injured; on return journey many of the airships drift over France; four brought down and one believed lost in the Mediterranean. Dunkirk bombarded from the sea. Armed merchant cruiser, Orama, torpedoed and sunk; no casualties. United States announces no supplies to be sent to Holland or Scandinavia until full particulars asked for of consumption, production, and requirements of all commodities, especially foodstuffs, are supplied.