From The American Revolution, by Sir George Otto Trevelyan, Longmans, Green and Company, 1903:
That habit did something to supply the want of a professional training in the American artilleryman. When the British fleet bombarded the Charlestown forts on the 28th of June, Carolinian officers laying down their pipes to point the guns, waited patiently for the smoke to clear away that they might aim with more precision. Seldom, in so fierce and engagement, was so little powder consumed by the victors, or so much tobacco. When the fire opened, the colonists had less than thrity rounds per cannon; and only seven hundred pounds of powder were sent to the batteries during the conflict. And yet the British flagship was hulled no less than seventy times; the squandron lost over two hundred killed and wounded; and the two largest men-of-war were reduced to little better than a couple of wrecks.