Further Reading
| Graphic Art of the 19th Century, by Claude Roger-Marx, Trans. by E.M. Gwyer. McGraw-Hill, New York, 1962. |
| The Oxford Companion to Art, edited by Harold Osborne. Oxford University Press, London, 1970. |
|
The Great Game. On Secret Service in High Asia, by Peter Hopkins (Oxford, Oxford University Press, 1991). |
| War in Afghanistan, 1878-80. The Personal Diary of Sir Charles Metcalfe MacGregor. Edited by William Trousdale (Wayne State University Press, Detroit, 1985). |