Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 133,750 pages of information and 211,898 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.