Four companies of the 3rd Battalion had joined before he left Boston, but not before he was sorely in need of their services, for he literally had not a relief for the men whom he had to keep constantly on duty. Two more companies were ordered from England to the South; four companies under Colonel Phillips were ordered to Canada, to take part ultimately in Burgoyne's wild expedition; and two more were embarked for service along the coast in bomb-vessels. A large number of 3-pounders, mounted on wheel-carriages devised by Captain Congreve, had arrived, and a larger number was promised. They were found infinitely more convenient than those Colonel Cleaveland already had, and arranged so as to be carried on the backs of horses and mules. Captain Congreve's ingenuity displayed itself in many ways, and called forth repeated expressions and letters of praise and commendation from Colonel Cleaveland. Doubtless the favourable reports made by that officer did much to procure for him— in 1778—from Lord Townsend, then Master-General of the Ordnance, the new appointment of Founder and Commandant of the Royal Military Repository. The grounds attached to that institution are now used solely for instruction in the management of heavy ordnance, but when it was first opened, the sharp turns and steep inclines in the roads of the Repository Grounds were made use of in training the drivers to turn and manage their horses. Captain Congreve—afterwards Sir William Congreve— was a very distinguished and able Artillery officer, but it was not he, but his son, who invented the well-known Congreve rocket. The officer who went in command of the companies of Artillery ordered for service in the South was Major Innes, an officer who commenced his career as a matross, and ended it as Commandant of the Invalid Battalion in 1783. Colonel James commanded the detachments on board the bombs, and was much praised for the accuracy of his fire at the unsuccessful attack on Fort Sullivan, near Charlestown, South Carolina, in June, 1776. He also commenced his career as a matross—in the year 1738—and died as a Colonel Commandant, in 1782. Several cadets were sent out to fill vacancies as they might occur, instead of promoting non-commissioned officers. While doing duty, awaiting these vacancies, they received pay as Second Lieutenants.