Sir John Hawkshaw

1. Walker, Thomas A. (1891): The Severn tunnel: its construction and difficulties, 1872-1887. 3^rd edition, Bentley.
2. Sir John Hawkshaw, 1811-1891. In: Minutes of the Proceedings of the Institution of Civil Engineers, v. 106, n. 1891-4 ( 1891), pp. 321-335.

   https://doi.org/10.1680/imotp.1891.20265