In the meantime Dundee had not been idle. Sending a few men straight down the valley, he led his main body across the Tilt, which joins the Garry just below the castle, round at the back of the hills till he had reached the English right. Mackay was in front with his skirmishers, watching what he supposed to be the approach of Dundee's van, when word was brought to him that the enemy were occupying the hills on the right in force. Mackay saw his danger at a glance. The Highlanders would be down like one of their own rivers in flood on his right flank, and roll the whole line up into the Garry. On one of the hills overlooking his position stood what is now known as Urrard House, but was then called by its proper name of Renrorie.[99] Immediately below this stretched a piece of ground large and level enough in Mackay's judgment for his army to receive, though not to give, the attack. He made no change in his line, but wheeling it as it stood upon the right wing, he marched it up the slope on to this new ground in the face of the enemy.[100] His position was now better than it had been; but it was bad enough. The river was in his rear, and behind the river the inhospitable mountains. His only way of escape, should the day go against him, lay through that terrible pass up which, with no enemy to harass him, he had just climbed with infinite toil. He could hardly hope to make good his retreat down such a road with a victorious army maddening in his rear. In the preliminary game of tactics he had been completely out-manoeuvred by his old comrade.