Though this circumstance was well known in camp, the men did not appear daunted at the idea of the horrid carnage it imparted. There was a spirit of animation among them, intimating a strong desire of coming to blows with the enemy. To conceal the design of the Americans, and to divert the enemy’s attention, a very heavy service of cannon and mortars began to play upon the town, between ten and eleven, on Saturday night, [March 2.] from Cobble Hill, Lechmere’s point and Lamb’sdam, a fortified battery at Roxbury. The firing was continued all that, and the two succeeding nights. The first night, two seven inch, and one ten inch, and the _congress_ mortar burst; the last after firing twice or thrice. Till the Saturday night, the enemy did not believe that the continentals had so many warlike instruments. But Mr. Henry Knox, who was unanimously elected by congress colonel of the regiment of artillery the 17th of last November, had been to Tyconderoga, and brought from thence and Crown Point across the lakes, while frozen sufficient to bear cannons, mortars and howitzers, to the number of fifty and better. Shells, &c. they had got from the king’s store at New-York, and out of the ordnance brig. The cannonade and bombardment did little damage, only shattered some houses and hurt a few soldiers. [March 4.] All things being ready on Monday; as soon as the evening admits, the expedition goes forward. The covering party of 800 men lead the way; then come the carts with the intrenching tools; after them the main working body of about 1200 under general Thomas: a train of more than 300 carts, loaded with fascines, hay in bundles of 7 or 800 weight, &c. close the martial procession. The bundles of hay are designed for Dorchester neck, which is very low, and exposed to be raked by the enemy; and are to be laid on the side next to them, to cover the Americans in passing and repassing. Every man knows his place and business. The covering party, when upon the ground, divides; half goes to the point nearest to Boston, the other to that next to the castle. All possible silence is observed. But there is no occasion to order the whips to be taken from the waggoners, lest their impatience, and the difficulty of the roads should induce them to make use of them, and occasion an alarm[4]. The whips used by the drivers of these oxcarts, are not formed for making much noise, and can give no alarm at a distance. The men in driving their oxen commonly make most noise with their voices; and now a regard to their own safety dictates to them, to speak to their cattle, as they move on, in a whispering note. There are no bad roads to require an exertion; for the frost having been of long continuance, they are so hard frozen as to be quite good. The wind lies so as to carry what noise cannot be avoided by driving the stakes and picking against the ground, (still frozen above eighteen inches deep in many places) into the harbour between the town and the castle, so that