"The Royal Navy in the Home Waters, 1914-1918" Royal visitors to the Naval Exhibition. Princess Mary, Prince Henry and Prince George were amongst the visitors to the Naval Exhibition at the Grosvenor Galleries in New Bond Street. They are here seen with Commodore Douglas Brownrigg RN, looking at a model of Zeebrugge Harbour (after the attack on St. George's Day, 1918). In the foreground is seen a piece of Zeebrugge Mole.