The work accomplished by the Post Office during the Indian Mutiny has been described in a separate chapter. Every office situated within the wide area of the disturbances or on the line of march of the troops performed the functions of a field post office, the control of the arrangements devolving on the chief local civil or military authority in places where there was no departmental officer of sufficient seniority or rank to hold charge. The great services rendered by the Post Office horse transit and bullock train establishments to the Army were a prominent feature of the campaign. Separate field post offices accompanied the moving columns under Generals Havelock, Outram, Campbell, Hugh Rose, Hope Grant and other leaders. Twenty years later, when the Afghan war broke out, the Army had again to rely on the Post Office for the transport of mails and military stores for hundreds of miles through the Khyber and Bolan passes into Afghanistan. The extension of the railways to the frontiers of India has put an end to this branch of postal enterprise. Mail tonga lines worked by contractors still flourish on routes where there are no railways, but they are being gradually supplanted by motor conveyances. A scheme under which the Post Office should maintain a large number of motor mail vans, which could be used in time of war for military transport, has already been suggested, and it is one well worth consideration. An arrangement of this kind should go far towards solving the problem of maintaining transport in times of peace, and should prove advantageous and economical to both the Army and the Post Office.