An indispensable guide to a regional treasure--now thoroughly updated and expanded. A comprehensive guide to one of America's unique national parks, The C&O Canal Companion takes readers on a mile-by-mile, lock-by-lock tour of the 184-mile Potomac River waterway and towpath that stretches from Washington, D.C., to Cumberland, Maryland, and the Allegheny Mountains. Making extensive use of records at the National Archives and...