Aware that Cressingham only wanted to gain time until De Warenne should arrive, Wallace determined to foil him with his own weapons, and make the gaining of the castle the consequence of vanquishing the earl. He told the now perplexed governor that he should consider Lord de Valence as the hostage of safety for Lord Mar and his family, and therefore he consented to withdraw his men from the inner ballium till the setting of the sun, at which hour he should expect a herald with the surrender of the fortress. Thinking that he had caught the Scottish chief in a snare, and that the lord warden's army would be upon him long before the expiration of the armistice, Cressingham congratulated himself upon this maneuver; and resolving that the moment Earl de Warenne should appear, Lord Mar should be secretly destroyed in the dungeons, he ordered them to their security again. Wallace fully comprehended what were his enemy's views, and what ought to be his own measures, as soon as he saw the unhappy group disappear from the battlements of the keep. He then recalled his men from the inner ballium wall, and stationing several detachments along the ramparts, and in the towers of the outer wall, committed De Valence to the stronghold of the barbican, under the especial charge of Lord Ruthven, who was, indeed, eager to hold the means in his own hand that were to check the threatened danger of relatives so dear to him as were the prisoners in the castle. Chapter XXXIII. Cambus-Kenneth. Having secured the advantages he had gained in the town and on the works of the castle, by manning all the strong places, Wallace set forward with his chosen troops to intercept De Warenne. He took his position on a commanding ground about half a mile from Stirling, near to the Abbey of Cambus-Kenneth. The Forth lay before him, crossed by a wooden bridge, over which the enemy must pass to reach him, the river not being fordable in that part. He ordered the timbers which supported the bridge to be sawed at the bottom, but not displaced in the least, that they might stand perfectly firm for as long as he should deem it necessary. To these timbers were fastened strong cords, all of which he intrusted to the sturdiest of his Lanark men, who were to lie concealed amongst the flags. These preparations being made, he drew up his troops in order of battle. Kirkpatrick and Murray commanded the flanks. In the center stood Wallace himself, with Ramsay on one side of him, and Edwin, with Scrymgeour on the other, awaiting with steady expectation the approach of the enemy, who, by this time, could not be far distant.