suit (standard diving dress). The real success of the equipment was a valve in the helmet. 1831: He bought 5 Denmark Street's leasehold. He lived and worked there for the rest of his life. 1856: He applied for and was given British citizenship. 1868: He bought the freehold of 5 Denmark Street. 1868: He retired because of old age and ill-health; 4 of his 5 sons had died by this time. 1870: Augustus Siebe passed his business to his son Henry Herapath Siebe and to William Augustus Gorman. The business started trading as 'Siebe & Gorman' 15 April 1872: He died at home of chronic bronchitis. He was buried at the West Norwood Cemetery. 1876: Siebe & Gorman moved to 17 Mason Street (later renamed Boniface Street), Westminster Bridge Road, Lambeth, London. 1878: Henry Fleuss with help from Siebe Gorman designed a practical oxygen rebreather: see Rebreather#History. 1880: The company's name changed to Siebe Gorman & Co. January 1882: Robert Henry Davis (age 11) (1870–1965) joined Siebe Gorman as an office boy. Over the years he learned much and became good at breathing apparatus engineering. 1887: Henry Herapath Siebe died aged 57. 1894: Robert Davis was promoted to General Manager of Siebe Gorman. 20th century September 1900: Robert Davis married Margaret Tyrrell. 1901: Robert Davis's and Margaret Tyrrell's first son Robert William Gorman Davis was born. Over the years Robert William Gorman Davis trained as an engineer and later joined the company. 14 Feb 1904: William Augustus Gorman suddenly died aged 69. (He was buried at Claygate Church in Surrey.) The company became a new private company 'Siebe Gorman & Co. Ltd.'. 1905: The Admiralty set up the first Deep Diving Committee. 1907: The resulting naval diving tables appeared. The Admiralty approached Siebe Gorman to help develop better deep-diving gear. 1907: The Siebe Gorman Proto industrial rebreather starts to be made. The Siebe Gorman Salvus and the Davis Submerged Escape Apparatus appeared later. 1930: The Admiralty set up the second Deep Diving Committee. 1932; King George V knighted Robert Davis, largely for inventing the Davis Submerged Escape Apparatus. 1938: Robert Davis, needing more room for factory expansion, bought 6 acres at Tolworth near Chessington in Surrey. The new building on it was named Neptune Works, on Davis Road. WWII 1938/39: Siebe Gorman was one of a number of British companies to receive contracts for the manufacture of tens of thousands