An hour later two horsemen rode out from the castle, but upon reaching the guard Leslie had placed were turned back. They returned to the castle, and a short time afterward a trooper rode down into the village with a note from Alan Campbell, demanding haughtily by what warrant Colonel Furness ventured to interfere with the free passage of his retainers. Harry replied that he had, as a military precaution, stationed guards on the various roads leading toward the enemy's quarter, and that they were ordered to turn back all, whomsoever they might be, who might seek to pass. Alan Campbell returned a furious answer, that he should sally out with his garrison, and ride where he listed. Harry replied by marching fifty men up to the road leading to the castle, and by sending a message to Alan Campbell that, although he should regret to be obliged to treat him as an enemy, yet that assuredly if he strove by force to break the military rules he had laid down, he should be compelled to fire upon him. Leaving the detachment under charge of Lieutenant Long, and the main body in the village under that of Hugh Grahame, Harry, accompanied by Donald Leslie and Mike, rode off to reconnoiter the morass. They found that it was particularly bad at two points, while between these the ground was firm for a distance of twenty yards on each side of the track. Beyond the swamp was very deep for thirty or forty yards on both sides, and then it was again somewhat firmer. Harry decided to post twenty-five men behind these quagmires. Their orders would be to remain perfectly quiet until the column, passing the first morass, should have entered the second; then, when Harry, with the main body, opened fire upon them there, they were to commence upon the flanks of the column. Returning to the camp, Harry sent forty men with shovels, obtained in the village, to dig a trench, twelve feet wide, and as deep as they could get for the water, across the track, at the near side of the morass.