Who is the speaker?

Attention, please, Ladies and Gentlemen, our bus is approaching Cambridge, Massachusetts, where we’ll be stopping to eat. We’ll have our lunch in a garden restaurant overlooking a small park that has a very interesting history. This park commemorates a tree, a very famous tree, because legend has it that General George Washington took command of the continental army in 1775 under its very branches. It was almost a hundred years later in 1864 that the city of Cambridge placed the plague on the tree to celebrate the event that made it famous. And from that moment, the tree was called the Washington Elm. In due time, the tree gradually succumbed to attacks of insects and lost much of its beauty. It was finally destroyed in a storm at the end of the century. But that is not the end of the story. The remains of the tree were cut down, and the concentric growth rings were counted to find out how old the tree was. Well, it seems that if Washington had accepted the command of his army beneath this tree, he must have done so on his knees. This particular elm couldn’t have been more than 3 or 4 years old in 1775. It is a well-known fact that Washington took command in the ceremony under an elm tree. But unfortunately, it couldn’t have been the famous Washington Elm. Well, enjoy your lunch, folks. Watch your steps as you leave the bus.