questions about the claypool family, an interesting note without a donation from descendents of betsy ross connected to have the revolutionary war diary of john claypool, betsy crosses third husband, a story there. what is the best book on the constitution convention, any recommendations? >> there are so many. there's a good overview, a vast literature. but that could be a start for what happened and the debate. >> is another question about native american constitutions and one other, maybe you want to talk about the charity cherokee. >> many did and do have constitutions today. the cherokee constitution is an especially notable one written in the 1820s and it was part of this attempt by the cherokees to secure their place in this new transformed continent and the cherokees and other nations did interesting things to try to -- these are all different strategies so different native american groups and different circumstances and different strategies but one strategy is to write a constitution, cherokees like to write about slavery and they pointed to this as another sign of their ability to