Colonel William Prescott, of Pepperell, Massachusetts, Colonel James Frye, of Andover, and Colonel Ebenezer Bridge, of Billerica, whose regiments formed most of the original detail, were members of the council of war which had been organized on the twentieth of April, when General Ward assumed command of the army. Colonel Thomas Knowlton, of Putnam's regiment, was to lead a detachment from the Connecticut troops. Colonel Richard Gridley, chief engineer, with a company of artillery, was also assigned to the moving columns. To ensure a force of one thousand men, the field order covered nearly fourteen hundred, and Mr. Frothingham shows clearly that the actual force as organized, with artificers and drivers of carts, was not less than twelve hundred men. Cambridge Common was the place of rendezvous, where, at early twilight of June 16, the Reverend Samuel Langdon, president of Harvard College, invoked the blessing of Almighty God upon the solemn undertaking. This silent body of earnest men crossed Charlestown Neck, and halted for a clear definition of the impending duty. Major Brooks, of Colonel Dodge's regiment, joined here, as well as a company of artillery. Captain Nutting, with a detachment of Connecticut men, was promptly sent, by the quickest route, to patrol Charlestown, at the summit of Bunker Hill. Captain Maxwell's company, of Prescott's regiment, was next detailed to patrol the shore in silence and keenly note any activity on board the British men-of-war. The six vessels lying in the stream were the Somerset, sixty-eight, Captain Edward Le Cross; Cerberus, thirty-six, Captain Chads; Glasgow, thirty-four, Captain William Maltby; Lively, twenty, Captain Thomas Bishop; Falcon, twenty, Captain Linzee, and the Symmetry, transport, with eighteen guns. While one thousand men worked upon the redoubt which had been located under counsel of Gridley, Prescott, Knowlton, and other officers, the dull thud of the pickaxe and the grating of shovels were the only sounds that disturbed the pervading silence, except as the sentries' "All's well!" from Copp's Hill and from the warships, relieved anxiety and stimulated work. Prescott and Putnam alike, and more than once, visited the beach, to be assured that the seeming security was real; and at daybreak the redoubt, nearly eight rods square and six feet high, was nearly complete. Scarcely had objects become distinct, when the battery on Copp's Hill and the guns of the Lively opened fire, and startled the garrison of Boston from sleep, to a certainty that the Colonists had taken the offensive. General Putnam reached headquarters at a very early hour, and secured the detail of a portion of Colonel Stark's regiment, to reinforce the first detail which had already occupied the Hill.