This is an excerpt from Eye Witness To History, to read it in it's entirety, Click HERE.
"It was now evening, and I immediately dressed myself in the costume of an Indian, equipped with a small hatchet, which I and my associates denominated the tomahawk, with which, and a club, after having painted my face and hands with coal dust in the shop of a blacksmith, I repaired to Griffin's wharf, where the ships lay that contained the tea. When I first appeared in the street after being thus disguised, I fell in with many who were dressed, equipped and painted as I was, and who fell in with me and marched in order to the place of our destination.
When we arrived at the wharf, there were three of our number who assumed an authority to direct our operations, to which we readily submitted. They divided us into three parties, for the purpose of boarding the three ships which contained the tea at the same time. The name of him who commanded the division to which I was assigned was Leonard Pitt. The names of the other commanders I never knew. We were immediately ordered by the respective commanders to board all the ships at the same time, which we promptly obeyed. The commander of the division to which I belonged, as soon as we were on board the ship, appointed me boatswain, and ordered me to go to the captain and demand of him the keys to the hatches and a dozen candles. I made the demand accordingly, and the captain promptly replied, and delivered the articles; but requested me at the same time to do no damage to the ship or rigging. We then were ordered by our commander to open the hatches and take out all the chests of tea and throw them overboard, and we immediately proceeded to execute his orders, first cutting and splitting the chests with our tomahawks, so as thoroughly to expose them to the effects of the water. 
The Boston Tea Party
In about three hours from the time we went on board, we had thus broken and thrown overboard every tea chest to be found in the ship, while those in the other ships were disposing of the tea in the same way, at the same time. We were surrounded by British armed ships, but no attempt was made to resist us.
...The next morning, after we had cleared the ships of the tea, it was discovered that very considerable quantities of it were floating upon the surface of the water; and to prevent the possibility of any of its being saved for use, a number of small boats were manned by sailors and citizens, who rowed them into those parts of the harbor wherever the tea was visible, and by beating it with oars and paddles so thoroughly drenched it as to render its entire destruction inevitable."