coming up next, harvard university history professor, vincent brown chronicles the 18th century they were hold that took place in jamaica. known as techies ripple. >> welcome to you all, i'm the president and ceo of the museum of the american revolution. it's wonderful to have so many familiar faces in the audience and we are live streaming the program this evening. will be on book to be. we will live on forever and ever at 3:00 a.m. when people can't sleep. i'll get a text for my father the following morning fast as you were on television again. i'm just curious, i show of hands, how many of you are visiting for the first time this evening to the museum? wonderful. welcome to all of you. you are surrounded by many of our members, our revolution society, this is a wonderful people who are great supporters of our music. we are pleased to partner with harvard for trust, you will see him up on the screen here. i know tim but all i can see is darkness out there. so let's thank them for making these possible. [applause] it's a real pleasure to be welcoming doctor vincent brown this evenin