This is the last letter that Hamilton ever wrote, composed the night before he crossed the Hudson to be shot at Weehawken on July 11, 1804. It was sent to my great-great-great grandfather, Theodore Sedgwick, the former Speaker of the House who had been a friend and legislative ally of Hamilton’s. It was saved for generations by the Sedgwick family until it was given to the Massachusetts Historical Society, where I found it on display some years ago when I was at work on a book about my family’s history. It inspired me to write War of Two, for it created a personal connection to that long-ago event, and, as I argue in the book, it explained Hamilton’s reasoning more expansively than any other document of his. Theodore Sedgwick never replied, for the sender was no longer here. - JS