CCAHA recently completed treatment of the Sol Feinstone collection at the David Library of the American Revolution, a nonprofit located near the Bucks County site of Washington's famous crossing of the Delaware. The collection comprises nearly 2,500 manuscripts documenting the founding years of the United States. There are more than 250 letters from George Washington, 65 letters from Thomas Jefferson, and 55 letters by Alexander Hamilton among others. The historian and author David McCullough has said, "The Sol Feinstone Collection of rare Revolutionary War documents is a national treasure of the first rank."