rear of the American lines, to entrap the incautious and unwary. In the afternoon of the 24th, Colonel P. F. Smith, of the mounted rifles, was sent out with a detachment of about two hundred men, to support a 'reconnoitering party under Lieutenant Roberts, who reported that a body of the enemy were on the heights near the Puente del Midois, a handsome stone structure thrown across a small stream of fresh water. running into the river Antigua. On approaching the bridge it was discovered to be barricaded with abattis, and that intrenchments had been thrown up on the heights. An attack was instantly ordered. Lieutenant Roberts displayed in the Chaparral on the right with his company, crossed the stream below the bridge, and having reached the enemy's left, drove them with great spirit from their position. Captain Pope seconded the movement with two companies on the other flank, and the whole detachment were almost immediately engaged in the pursuit, which was continued for nearly a mile. At sunset they returned to the camp, having killed and wounded a large number of the enemy, with the loss of but four men wounded.
On the 25th instant, Colonel Harney proceeded with a squadron of dragoons commanded by Major Stunner, and fifty dismounted men under Captain Ker, towards the Madellin river, in consequence of a report that a mounted force was collected in that direction. On arriving near the Puente de Marino, he found it to be regularly fortified, and guarded by near two thousand men, with two pieces of artillery. Small parties of lancers were also seen in the Chaparral which skirted the bridge. When the detachment came within sixty yards, the enemy opened a heavy fire, and killed and wounded several of the command. Colonel Harney
