For, to the disgust of the Troopers, daylight brought no news of the missing canvas, and visions of another night in the mess tents of the Battery and Sheridan Troop began to disturb the men. Captain Groome and his lieutenants had planned plenty of work for the men, however, and as soon as their minds were once occupied they began to feel better. Details were sent to relieve the guard that had been placed over the baggage car, to secure wagons to haul the luggage to the camp grounds and to do regular sentry duty.
While the spot selected for a camp by Captain Groome had its disadvantages in rainy weather, it proved to be on the whole, the most desirable spot on the entire grounds; one of its greatest advantages being the nearness of Lake Conawago, where later in the season the men enjoyed a daily bath. The Philadelphia infantry commands had been assigned the worst quarters at Mt. Gretna. They occupied a deep basin, fully a mile and a half from the station and telegraph office, and during the entire time the First, Second, Third Regiments and Battalion of State Fencibles remained there, the valley was a sea of red mud. Every other regiment was encamped on rising ground, where the sandy soil was well drained and kept comparatively dry despite the long continued rains which set in.
In the afternoon the Troopers tents arrived, and went up with astonishing rapidity. The men worked hard arranging wooden supports for their straw-filled canvas bags, so they would not be obliged to sleep on the wet turf. The horses had been well sheltered in the woods near the camp, but men and beasts alike were glad when they saw the bright sun on Saturday morning. These weather conditions quickly wrought a great change throughout the miles of tented streets. Soldiers faces brightened and the Troopers, who had kept up their pluck splendidly under a stress of unfortunate circumstances such as no other organization had been obliged to face, could not help showing their pleasure at the improved prospects.
Sunday was spent for the most part in straightening up the camp. In the afternoon there were a number of visitors on hand from Philadelphia, although rainy weather had set in again. All kind of rumors were current as to what would be done with the State organizations, and many feared that the Troop would not be allowed to enlist as a whole, but that the men would be called upon to enter the volunteer service as individuals. These rumors soon died away, however, and on Monday when the men were lined up and asked if they were willing to enter the service of the United States there was but a single dissenting voice. One private refused to volunteer, and he at once resigned from the Troop. As there was no provision in the call for volunteers for an assistant surgeon, with a troop of cavalry, Dr. Charles H. Frazier could not be mustered in.
After the privates and non-commissioned officers had expressed their willingness to volunteer, Colonel Morrell addressed the officers as follows: "Is it your desire that I should request the Governor of Pennsylvania to issue to you a commission for the same places you now hold in the volunteer army of the United States?"
Captain Groome and Lieutenants Browning and McFadden signified their desire to serve, and Governor Hastings at once responded that it would give him great pleasure to have the commissions made out as requested.
After this inspection the men settled down to camp life with zest. On the day they had signified their willingness to enlist, the great news had come of Commodore Dewey's victory in the harbor of Manila. The destruction of the entire Spanish fleet in the East, gave a new turn to the war, and it was soon whispered that it would not be long before some of the men encamped at Mt. Gretna would be on their way to these distant islands in the Pacific. Daily drills were taken up with added interest. Wednesday and Thursday were rainy. The brigade surgeons were being examined, and all was put in readiness for the physical examination of the soldiers, preliminary to their being mustered into the volunteer service. Friday the City Troopers were examined and four men were rejected by the surgeons, chiefly for defects in eyesight. Two of these were afterward reinstated by direct orders from Washington.
Saturday, April 28th, the Troopers were marched down to division headquarters to be mustered in. A heavy Scotch mist hung over the camp, and objects at a short distance were invisible. The men were lined up before a long wooden platform upon which stood Major William A. Thompson, of the First U. S. Cavalry, the officer detailed by the War Department to muster the Pennsylvania National Guard troops into the Volunteer service of the United States; Governor Hastings and his staff, and hundreds of spectators. As the roll was called, each Trooper stepped forward and answered to his name. Then the mustering officer told the men and officers to raise their right hand. Up went the hands and the spectators removed their hats while Major Thompson repeated this oath:
"Do you solemnly swear that you will bear true faith and allegiance to the United States of America, and will serve them faithfully against all their enemies whomsoever, and that you will obey the orders of the President of the United States and the orders of officers appointed over you, according to the rules and articles of war?"
"I do!" shouted each man in the same breath, and as the hearty response went up, the spectators applauded and the Third Regiment Band, sheltered in a building near at hand, struck up "The Star Spangled Banner." The officers' commissions were then filled in by the Governor and handed to their owners. Back to their camp marched the Troopers, no longer their own masters but servants of Uncle Sam, and as they filed past the mustering stand, a company of infantrymen stepped up to go through the same ceremony.