These were soon found untenable, and it was Lieutenant-Colonel McAvoy, who commanded the Colorado battalions, that was the first to assume a position in front of the enemy. He advanced the line to an old Capuchin chapel, that stood in the middle of the field, between the Spanish position and the insurgent trenches. The Colorado and Nebraska men, who threw up the new breast-works at the point that Colonel McAvoy had chosen, were occasionally fired at by the Spaniards, who had a good view of what the Americans were doing. The breast-work was about seven feet high, with notches and peepholes for the lookouts. Inside the parapet was a parallel elevation of about two feet--for the men to stand on when they wished a shot at the enemy. The old chapel itself was in the line of defense, and was used for cover; though it was nearly wrecked by the many shells that had been thrown against it. Saturday, July 30th, two batteries were placed in position: they were A and B of the Utah Battalion. The guns of the former were placed on the right, those of the latter on the left, of the chapel. It was, accordingly, near Pasai, about ten o'clock the same day, that the first American blood was spilt. The First Colorado regiment had just been relieved by the men from Nebraska, and were returning to camp, when a Spanish bullet hit Private W. H. Sterling of Company K. in the upper part of the left arm. The wound, however, was very slight, and Sterling was soon back in the ranks. Saturday night the Spaniards began a lively fusillade. But this did no damage--the men were safe inside the newly-finished parapet. The rain, in fact, made things far more uncomfortable than the Spanish bullets. It fell in torrents, but the inventive Yankees tore up the floor of the old chapel, and hastily built shelters, which effectually kept off the water. The Spanish trench was about 800 yards from the American breast-works. It extended northeast, just in front of the old fort at Malate, and was strengthened with rocks and sandbags. The land between the two trenches was low and level. On Sunday night Spaniards advanced beyond their works, began a heavy fire against the Americans, and drove in the pickets of the Tenth Pennsylvania. The bullets began to fall among the Americans, and the guns of Malate roared continuously. The night is described as awful. From the skies fell tons of water, while the wind blew with the force of a cyclone, howling and shrieking through the swaying trees. Major Cuthbertson was in command of the Pennsylvanians, and when the pickets came in and reported that the enemy was trying to flank the Americans, he ordered K and B companies into the trench, and also commanded Major Bierer, who commanded companies D and E, to the front.