The column had scarcely settled down in Peshawur when fresh troubles were reported from the wearyful Momund frontier. Sir Colin hurried thither with two horse-artillery guns and two hundred and sixty native troopers, to find the Momund chief Sadut Khan in position on the edge of the Panj Pao upland, fronting towards Muttah, with six thousand matchlock men and some eighty horsemen. The affair had its interesting features. Sir Colin took in reverse the Momund hordes with his artillery fire, broke up their masses, put them to flight, and pursued them. As he was preparing to return the Momunds suddenly wheeled in their tracks and rushed upon him over the broken ground. The guns were instantly unlimbered, and double charges of grape checked the wild and gallant attack,--a brilliant rally after the endurance of two hours' shell fire followed by a hasty retreat. The mountaineers continued to press Campbell's slow retirement across the table-land, notwithstanding the fire of grape which he maintained. The incident strengthened his belief in the superior efficacy of defensive operations, and he declined to fall in with the anxious wish of the Punjaub Board of Administration that he should act on the offensive against the Momunds, on the ground that he was not prepared to execute operations of that character without the most precise orders by the Commander-in-Chief, the authority to which he was responsible. His reply met with the full approval of the Commander-in-Chief, which however the Governor-General did not share. Sir Colin maintained his ground with the approval of the former authority, when pressed by the Commissioner of Peshawur to enter Swat. Meanwhile the Ootman-Kheyl tribe had become implicated in the murder of a native official in British employ at Charsuddah. Sir Colin had no hesitation in taking measures to inflict punishment on this powerful and turbulent clan. A column of all arms, two thousand four hundred and fifty strong, was assembled on the left bank of the Swat river, and on May 11th proceeded to destroy a group of deserted villages belonging to the Ootman-Kheyl. The column then advanced on the large village of Prangurh, the Ootman-Kheyl stronghold. It had been prepared for defence, and was crowded with men who opened fire on Sir Colin's advanced guard. Covered by artillery fire his troops carried the village with a rush, after a stout defence on the part of the enemy. During the destruction of Prangurh letters were found proving a strong feeling of hostility towards the British Government on the part of the rulers of Swat. Sir Colin then fell in with the views of the Commissioner, and declared himself prepared to invade the Swat territory unless he should be absolutely prohibited by the Commander-in-Chief.