19th. At 2 o’clock we began our march by wading through a very long ford up to the middles; after going a few miles we took three or four people who were going off to give intelligence; about five miles on this side of a town called Lexington, which lay in our road, we heard there were some hundreds of people collected together intending to oppose us and stop our going on; at 5 o’clock we arrived there, and saw a number of people, I believe between 200 and 300, formed in a common in the middle of town; we still continued advancing, keeping prepared against an attack through without intending to attack them; but on our coming near them they fired on us two shots, upon which our men without any orders, rushed upon them, fired and put them to flight; several of them were killed, we could not tell how many, because they were behind walls and into the woods. We had a man of the 10th light Infantry wounded, nobody else was hurt. We then formed on the Common, but with some difficulty, the men were so wild they could hear no orders; we waited a considerable time there, and at length proceeded our way to Concord.
Entry for April 19th 1775, from the diary of Lieutenant John Barker, an officer in the British army.