Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,337 pages of information and 233,846 images on early companies, their products and the people who designed and built them.
A. A. Langley, M Inst C E
1870 Manager and Engineer of the Hereford, Hay and Brecon Railway
1881 Langley's Safety Buffer Stops. 
1882 Presented to the Institution of Mechanical Engineers the so-called "Bazin dredger"; this had been worked with great success in the harbour at Lowestoft and elsewhere by Mr. Charles Ball.
1883 Chief Engineer of the Midland Railway