The last detail now had been attended to, and on November 14th the First was ready for the final step towards leaving the volunteer service. Early in the forenoon of that day Majors Dyar and Quinby assembled their batteries at the South Armory, where, with the field, staff, and non-commissioned staff, they formally were mustered out of the service of the United States by Lieutenant-Colonel Weaver. At the same time Major Frye had accompanied Lieutenant J. P. Hains, Third United States Artillery, to the stations of the "Cape" batteries on a like mission. Lieutenant Hains enjoyed the distinction of having received almost the last wound in the Porto Rican campaign, having intercepted a Mauser bullet in the action at Aibonito, almost at the time when the peace protocol was being signed. He had become very popular among the officers of the First, and his selection as mustering out officer was much to the satisfaction of the Third Battalion. Of the seven hundred and fifty-seven officers and men whose names had been borne on the rolls of the regiment during its term of service, there were mustered out at this time seven hundred and eleven. The regiment had lost two commissioned officers—Major Bryant by promotion, and Lieutenant Rolfe by resignation—and forty-three enlisted men, of whom Private Henry A. Williams, "F" Battery, had died while on furlough, one had received promotion, six had been discharged for physical disability contracted in the line of duty, and the remainder had been transferred to the regular service, the greater number of these enlisting in the Second United States Artillery. Major Dearing was not mustered out with the other officers of the staff, remaining in the service until Jan. 28th, 1899, for duty as examining surgeon with other returning Massachusetts regiments.