text:  "One apprehension upon my mind is that in the event of your deciding upon moving on Jellalabad by Ghuznee and Cabul the accumulation of so great a force as that of your army combined with Major-General Pollock's in the narrow valley of the Cabul river may produce material difficulties in the matter of provisions and forage; but every effort will be made from India to diminish that difficulty should you adopt that line of retirement