Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 142,975 pages of information and 229,093 images on early companies, their products and the people who designed and built them.
Captain Gilbert A. Ballard (c1889-?) R.E., O.B.E., M.Inst.C.E., M.Inst. M. & Cy.E., A.M.T.P.I., F.R.S.A.
1939 Engineer and Surveyor, Coulsdon & Purley U.D.C., Council Offices, Brighton Road, Purley, Surrey. Private address: Steepholme, Woodcote Grove Road, Coulsdon.