sent out from England to add to his fleet. On 18 August 1919, Agar took his remaining boat against the Soviets, acting as guide-ship to a flotilla of six others, leading them through the minefields and past the forts. Agar's boat was ordered to stay outside the harbour, and the attack was led by Commander Claude Dobson. They entered Kronstadt harbour, this time damaging two battleships, 17,400 ton pre-dreadnought and dreadnought and sinking a submarine depot ship, the 6,734 ton . Paul Dukes, meanwhile, thinking Agar dead because of his failure to appear at their rendezvous point, resolved to leave Petrograd by land and was forced to jump from tram to tram in the city to shake off Cheka agents. After a series of extraordinary adventures through war-torn Latvia under a variety of disguises, he got back to London with his secret documents copied onto tissue paper. He was subsequently knighted by King George V, and remains the only man to be knighted based entirely on his exploits as a spy. For his part in the Kronstadt action, Agar was awarded the DSO. Dobson and another RNB officer Gordon Steele received Victoria Crosses. The British naval presence in the Baltic Sea was crucial to securing the independence of Estonia and Latvia. Between the wars Immediately following his Baltic experiences, Agar returned to Osea Island. On 20 July 1920 he married Mary Petre, 19th Baroness Furnivall. Agar held a number of seagoing commands between the wars. His first, in June 1920 was as executive officer aboard , a 5,400 ton light cruiser assigned to the newly formed New Zealand Naval Forces, later known as the New Zealand Division (then still part of the Royal Navy). In 1922 he was given command of , an obsolete cruiser of 2,575 tons used as a training ship for the New Zealand Division. These were very happy years for Agar, in a friendly country with interesting work and regular cruises through the South Seas. On 1 January 1924, at the request of King George V, Agar was appointed captain of the Royal Yacht , another pleasant duty. He served until January 1925. A great professional assignment in April 1926 was command of the 4th Destroyer Flotilla assigned to the Mediterranean Fleet. The commander in chief, Admiral Sir Roger Keyes, specifically asked for Agar. Keyes was an outstanding leader and brought the fleet to the height