Such was the general condition of the respective parties on the 2d of January, 1857, when the steamer San Carlos, as heretofore narrated, crossed the lake with the passengers from California to the Atlantic States. The morning report of the troops at Rivas on the 3d will give an accurate idea of the American force at that time. The total, including those employed in the several departments, is reported at 919. Of these, 25 were employed in the ordnance department; 15 in the quartermaster’s department; 20 in the commissary’s and 12 in the band; thus leaving an aggregate in the line of 847. Of the aggregate 8 were of the post and division field and staff, while 1 captain and 29 privates were on detached duty; 3 captains, 3 lieutenants, and 2 privates, on furlough; and 2 privates absent without leave. Thus the aggregate present was reduced to 788; and of these 60 were on extra duty, and 197 sick. The number for duty, officers and men, was 518; but many of those reported sick had only chigoës in their feet, and were fully able to aid in the defence of the town. Laziness and a disposition to shirk duty placed many on the sick list, who in an emergency might have proved among the best fighting men in the garrison. Henningsen had been promoted to the rank of major-general, and Sanders to that of brigadier; so that O’Neal had command of the First Rifles, with Leonard as lieut.-colonel, and Dolan as major, while Jaquess was in command of the Infantry, and Lewis of the Second Rifles. The Artillery, as well as the Rangers were very much thinned by the hard service through which they had passed; and Col. Schwartz, being in bad health, soon after reaching Rivas, obtained leave of absence to visit California. Col. Waters kept the small companies of Rangers under his command, riding constantly in search of supplies and information. In a few days after the San Carlos left Virgin Bay with the passengers, uneasiness was felt on account of the non-arrival of the steamers from the river. There were several causes which might be assigned for their detention, one being the misunderstanding between the two agents of the company, Scott and Macdonald. The improbabilities, too, of all the steamers falling into the hands of the Costa Ricans were so many, that in the event of the enemy’s appearance on the river, it was supposed some news of the fact would soon reach Rivas. It was many days before the steamers finally appeared on the lake, and then their movements indicated that they were in the hands of the Allies. In the meantime, the steamer Sierra Nevada, which had been waiting at San Juan del Sur for the passengers, sailed for Panama; and it was not until her return on the 24th of January, that Walker heard definitely the events which had transpired on the river, and of Lockridge’s presence at Punta Arenas, with a body of immigrants for Nicaragua.