As soon as the regiment found that their services would not be accepted for three months, they set to work preparing for a three-year enlistment. Lt. Col. Burrell and others who could not go for the long term organized themselves into a reserve or “depot” regiment. New companies which had been added in April with a view to entering the three months’ service brought the total up to ten; and these all gladly entered into the three-year enlistment. The Chadwick Light Infantry, named for Hon. Joseph H. Chadwick of Roxbury, a liberal contributor toward the company expenses, became 2d Company in the regiment. The Pulaski Guards, newcomers in the regiment, shifted from 9th to 4th place. Members of the Chelsea Light Infantry, a 7th Regiment command which had just been disbanded because of the disobedience of its captain, resented the false position in which they were placed; and hastened in a body, on April 19, to the State House where, with Gov. Andrew himself presiding, they reorganized and forthwith received a charter as the “Chelsea Volunteers.” This accomplished, the new unit at once became the 5th Company in the 1st Regiment. While there had been two 7th Companies within a month, both had gone off with other regiments; and the vacant number was now filled by the North End True Blues. The True Blues consisted of caulkers, gravers and riggers from the ship-yards. They had begun their history many years previously as a fire-engine company, and in 1832 had taken up military training. But it was not until April, 1861, that they regularly connected themselves with the militia. A newly organized Brookline company took the 8th place, made vacant by the transfer of the Boston Artillery. The National Guards, newcomers in the regiment but with a history running back to the Mexican war, assumed the 9th number. And the Schouler Guards, named after the popular Adjutant General of Massachusetts, became the 10th Company.