https://www.c-span.org/video/?439569-1/mark-twain-virginia-roots

SPEECHES, a partial listing

Harvard University
George Washington’s Mount Vernon
The International Center for Jefferson Studies at Monticello
Jefferson Society, the University of Virginia
The Virginia Historical Society
The Cato Institute
The Urban Land Institute
Virginia Festival of the Book
Constitution Day, James Madison University
Great Lives Series, Mary Washington College
Cooper Union
… and scores of historical societies and book groups