Sketch map prepared by Sir Robert Warburton to illustrate eighteen years in the Khyber.
Warburton, Robert, Sir K.C.I.E.
Lahore :  O.U.P., Pakistan Branch, 
1970.
Facsimile.
In: Eighteen Years in the Khyber, 1879-1898. By ... Sir Robert Warburton.
Routes are shown.