History of Royal Sappers and Miners...
T.W.J.Connolly
London 1857

https://www.tradeshouselibrary.org/uploads/4/7/7/2/47723681/history_of_the_royal_sappers_and_miners_[microform]_~_from_the_formation_of_the_corps_in_march_1772_to_the_date_when_its_designation_was_changed_to_that_of_royal_engineers_in_october_1856_~_1857.pdf