T. W. J. Connolly, History of the Royal Sappers and Miners…
“ To carry on a sap, or drive the gallery of a mine, was alike an impossible attempt. The army had neither a single sapper, miner, or pontoneer, and a few drunken and worthless military artificers formed the only engineer troops.... The lessons of experience thus dearly bought have not been acquired in vain. The practical engineer school at Chatham, organised and long directed by Colonel Pasley, has produced a corps of sappers and miners equal to any in Europe. Their exercises on the Medway have likewise given them the qualities of excellent pontoneers. ”
