Changes

*[http://www.archive.org/stream/historycorpsroy01portgoog#page/n9/mode/1up History of the Corps of Royal Engineers Vol I] by Maj-Gen Whitworth Porter 1889<br />::[http://www.archive.org/stream/historycorpsroy00watsgoog#page/n61/mode/2up Vol II 2nd Afghan War and Egyptian Campaign 1882]<br />*[http://www.archive.org/stream/kandaharin02messgoog#page/n4/mode/2up ''Kandahar in 1879: The Diary of Major Le Messurier R.E., Brigade Major R. E. with the Quetta Column''] 1880 Archive.org