The Variorum Walden and The Variorum Civil Disobedience. Henry David Thoreau. Annotated and with introductions by Walter Harding. Washington Square Press, 1968. This is the third printing, 1970. Paperback, 370 pp. Walter Harding's precursor to the annotated Walden he released in the 1980s. Paperback has aged naturally and is in good condition. If you don't have one of the major annotated editions, you may want to start with this one.