Nor was the increase of strength by the new and more efficient organization the only added force Henningsen now had. The men recovering from the effects of debauchery in the town and seeing the necessity for laborious effort were more willing to work than they had hitherto been. During the night of the 27th, they worked with a vigor which surprised their commander, and by daybreak of the 28th, they had finished an adobe breastwork the general had scarcely hoped to see completed. Major Swingle, by his industry and intelligence, did much to forward the labors of the men, and it would have been difficult for Henningsen to find a man more capable than Swingle of directing the execution of any orders he might issue. But the concentration of the force at the Guadalupe, while it enabled Henningsen to complete an organization whereby his men were more readily handled, had its inconveniences and dangers. The crowding together of more than three hundred persons, many of them sick and wounded was calculated to affect the health of the camp; and the exposed nature of the ground where Henry was posted, commanded as it was by several points in the hands of the enemy, made it impossible to move non-combatants thither until it was properly entrenched. On the 28th the enemy, under cover of a flag of truce, sent into the American camp a renegade by the name of Price, together with an aide of Zavala, bearing a letter to “the commander-in-chief of the remains of Walker’s forces.” This letter invited the commanding officer, for humanity’s sake, to surrender himself and soldiers prisoners-of-war, promising them safety and passports to leave the country. Price, too, at his entrance into the camp urged the men to give up their arms as they were surrounded by three thousand of the Allies, but Price was immediately arrested and silenced, and a defiant reply to their insulting invitation was forthwith despatched to the leaders of the hostile forces. The aide was evidently sent as a spy, for he entered without being blindfolded or duly introduced, and Henningsen showed his contempt for the Allied leaders by telling the officer he might pass through his camp and observe all his defences.