"A joke that won't bear repetition, señorita," he replied, and then bowed himself away.

The eastern track being now impassable, he thought it sufficient to leave a few men at the broken bridge to guard against any attempt to repair it. The rest he withdrew to the camp. One of the vedettes on the western track having been surprised and killed, he decided as a precaution for the future to place the men in couples. He did not enlighten Colonel Zegarra, when the visitors had gone, as to his flight through the air, but simply informed him that the bridge had been blown up to check a troop of the Prefect's horsemen.

Before he retired for the night he thoroughly examined the cycle, and found that the tyres, though showing signs of wear, were as yet sound. He gave it to one of the Japanese to clean, and then sought his couch, worn out by the racking experiences of the day.

Next morning word was brought that the enemy were advancing in force along the western track. Colonel Zegarra was not lacking in courage, and the plan of action to be followed in the event of attack had been settled in several conversations between himself and Tim. The ground on both sides of the track for half a mile from the cross-roads was fairly open, affording a clear field for fire. Though the enemy outnumbered the Mollendists, the latter had the advantage of being the defenders. Their position, protected by earthworks and the fringe of wood, was so strong that an attempt to force it ought not to succeed. To harass the enemy in flank, Tim had arranged to post himself with a small detachment in a dense copse on the left of the track about a mile in front of the camp. With luck he might not be discovered; if he was attacked, the closeness of the trees would enable him to make a good defence. He chose thirty of his own Japanese for this duty, knowing their good fighting qualities and their absolute personal loyalty to him.

They had been stationed in the copse for some hours before the head of the enemy's column appeared. The men were on foot. Tim had intended to worry them as they advanced, but it now occurred to him that he would do better to hold his hand until the attack developed. If Colonel Zegarra should be in difficulties, a sudden assault on the enemy from the rear might turn the scale.

The enemy opened out as they approached the cross-roads, intending to surround the camp. They made a concerted rush, but in the lack of artillery they were seriously handicapped, and after several attempts had failed, they fell back to cover. Some retreated in the direction of the copse. Tim saw his opportunity. Bidding his men wait until they were within a few hundred yards, he then gave the order to fire. In the shock of surprise the enemy fell into disorder, and fled in all directions. Their confusion was communicated to the whole force, and soon the discomfited rabble were in full retreat, suffering severely as they crossed the line of fire from the camp.

Colonel Zegarra rose to the occasion. Ordering his men to mount, he led them in pursuit. The retreat became a rout. Ridden down by the horsemen, cut up by the steady firing of Tim's men in the copse, the enemy were a disorganised mob before they reached their horses, which they had left about two miles down the track. Some succeeded in mounting, and galloped away. Others were headed off, and were made prisoners. Within an hour of the first attack the Prefect's eastern force was shattered, and no longer existed as a fighting unit.

There was great jubilation among the Mollendists. On returning to camp Colonel Zegarra at once penned a flowery despatch to Mr. O'Hagan announcing his victory. The courier had not been gone long when Romaña rode up in haste, bearing a verbal message from the commander-in-chief. After long delay the Prefect was making a determined effort to force the defile, and Mr. O'Hagan asked for a reinforcement of fifty men, if they could be spared. It was arranged that Tim should start at once with fifty horsemen. It seemed unlikely that the troops just defeated would rally, but for assurance' sake he persuaded Romaña to remain at the cross-roads, to advise Colonel Zegarra if the enemy should attempt any movement which must be met rather by craft than by courage.

Tim rode ahead of his troop on the motorcycle. When about a third of the way to the defile, he suddenly discovered on his left a considerable number of men on foot descending from the hills towards the highroad. Their intention clearly was either to take the main Mollendist army in the rear, or to make a swoop on the cross-roads and then to San Rosario. Tim guessed that his father was unaware of this complication. The men must have been for at least two days on the march, for the hills were generally regarded as impracticable.

Tim halted for a few moments to make a rapid calculation. His father and Colonel Zegarra must be warned. If he rode on, the enemy, though at present a long distance away, would be on the road between him and Colonel Zegarra by the time he returned. On the other hand he might ride to the colonel and back before they reached the road, in which case he would still have a chance of slipping by.