By John O. Newell INTRODUCTORY NOTE This essay is a very brief summary of the battles of Lexington and Concord. Obviously, this topic could fill a book-and has. Two of the best books on these events are David Hackett Fischerâs Paul Revereâs Ride (Oxford University Press, 1994) and Gen. John R. Galvinâs The Minute Men: The First Fight-Myths…