230 THE EMPEROR HUMAYUN probably have overwhelmed Humayun's army, on which the irritation as well as the revels of the delay had exerted their usual influences; but the triumph of the heavy artillery in the siege of Chitor had given undue weight to the advice of the Ottoman engineer, the " Bumi Khan," who had worked the guns with the help of Portuguese and other European gunners; and, as with Sir John Burgoyne before Sevastopol, the voice of the engineer prevailed over the bolder counsels of the cavalry leaders. At the Rumi Khan's motion, in- stead of falling instantly upon the imperial troops, the army of Gujarat penned itself up in a fortified camp. The enemy, as the engineer foretold, confronted by the big guns, could not get in; but on the other hand the defenders could not get out. The open country around was in the hands of the Moghul archers, whose arrows gave short shrift to any men of Gujarat who ventured outside the ditch. Famine rendered the camp untenable, and at last in the dead of night Bahadur slunk away with only five followers. His army, discovering the desertion, immediately dispersed, and Humayun, on seek- ing the cause of the unusual hubbub, found himself in undisputed possession of the vast camp and all the spoils of the enemy. On this occasion he showed unwonted energy; pursued the King of Gujarat to Mandu, and on to Champanir, and Ahmadabad, and thence to Cam- bay, one fleeing as the other entered, till Bahadur at last found refuge in the island of Diu. The entire region of Malwa and Gujarat two provinces which were equal in area to all the rest of Humayun's kingdom had
