Born Percy Main 5 June 1805. Following work at pit in Killingworth joined Robert Stephenson & Co. in late 1823 or 24. Locomotive Superintendent of Leicester & Swannington Railway where Comet was first locomotive. Dismissed on 15 January 1834. Sent by George Stephenson to Belgium in 1835 to work on Brussels & Mechlin Railway opened on 6 May 1835. On 24 July 1837 appointed chief mechanic and engineer Belgian State Railways. He was seriously injured in a crash involving the Royal Train at Ghent on 21 August 1838. He married Elizabeth-Mathilde Vifquain, daughter of a well-known civil engineer. Patented a modified gab gear (Belgian patent 2028 of 31 July 1841). Invented an exhaust regulator fitted to locomotives supplied by Sharp Roberts to South Eastern Railway. His valve gear probably led to the Walschaerts type. He invented a sledge brake for use on the incline at Liege, and a gripper mechanism for a continuoulsy running cable. Probaly invented steam trumpet used on Leicester & Swannington Railway. Became a Belgian Citizen on 13 October 1846 and rose to tank of Inspector General. He died on 6 March 1881 Obituary: Proc. Instn Mech. Engrs., 1874, 25, 16..
Born New York (Northumberlnad, near Whitley Bay) on 6 June 1801, died York 1 September 1873. Worked for Robert Stephenson. Assisted in erection of stationary engines on Stockton & Darlington Railway at Brusselton and Etherley in 1824/5. When Head Foreman for Stephenson he was associated with Thomas Shaw Brandreth in attempting to lower the friction of wagons (Patent 8 November 1825). Involved in erection of stationary engine on Daubhill Incline on Bolton & Leigh Railway in May 1827. From the summer of 1829 he was involved with the stationary engines on the Canterbury & Whitstable Railway, practical improvements to Invicta on that Railway. From 21 November 1836 he was resident engineer on the York & North Midland Railway and in 1843 took charge of the North Midland Railway department, returning to York in 1846 as Locomotive Superintendent of the York & North Midland Railway. He invented a form of locomotive valve gear. On formation of the NER he became engineer of the Southern Division. He was involved in experiments with sledge brakes on the Whitby & Pickering Railway. Cabry was closely associated with Hudson's ventures and he was active in public life in York. He was a founder member of the Institution of Mechanical Engineers: thus it is extraordinary that he is not in the ODNB (which may reflect upon the officials of that Institution). Obituary: Proc. Instn Mech. Engrs., 1874, 25, 16-17...See: Brian Lewis. The Cabry family, railway engineers. 1994.