The progress of Nadir from Kabul to India was rapid and successful: almost all the governors of the principal provinces through which he passed anticipated the fate of the empire by their submission; but the conqueror has, in a letter to his son, Reza Kuli, given us the most authentic account we could desire to possess of events from the day on which he left Lahore till that on which he resolved to restore the vanquished Mahomet Shah to the throne of his ancestors. After informing that Prince of an advantage which his troops had gained over an advanced party of his enemies, and describing an ineffectual attempt he had made to prevent the junction of an army under Saadut Khan with Mahomet Shah, he states that the Indian monarch considered himself so strong from his reënforcement that he left his intrenchments, and drew up his troops in order of battle. The result will be best told in Nadir's own words. "We," he observes, "who wished for such a day, after appointing guards for our camp, and invoking the support of an all-powerful Creator, mounted, and advanced to the charge. For two complete hours the action raged with violence, and a heavy fire from cannon and musketry was kept up. After that, by the aid of the Almighty, our lion-hunting heroes broke the enemy's line and chased them from the field of battle, dispersing them in every direction. This battle lasted two hours; and for two hours and a half more were our conquering soldiers engaged in pursuit. When one hour of the day remained, the field was entirely cleared of the enemy; and as the intrenchments of their camp were strong and the fortifications formidable, we would not permit our army to assault it. "An immense treasure, a number of elephants, part of the artillery of the Emperor, and rich spoils of every description were the reward of our victory. Upward of twenty thousand of the enemy were slain on the field of battle, and a much greater number were made prisoners. Immediately after the action was over we surrounded the Emperor's army, and took measures to prevent all communication with the adjacent country; preparing at the same time our cannon and mortars to level with the ground the fortifications which had been erected. "As the utmost confusion reigned in the imperial camp, and all discipline was abandoned, the Emperor, compelled by irresistible necessity, after the lapse of one day, sent Nizam-ul-mulk, on Thursday, the 17th Zilkadeh, to our royal camp; and the day following, Mahomet Shah himself, attended by his nobles, came to our heaven-like presence, in an afflicted state.