NY, Harper & Row, (1982). Zwinger, winner of the John Burroughs Medal, and Teale, winner of the Pulitzer Prize, collaborated on this book about the two rivers that join to form the Concord River, beloved by Thoreau. This copy is signed by Zwinger. A landmark collaboration by two of the most respected naturalists writing at the time. Zwinger, whose writings had generally been about the West, was president of the Thoreau Society at the time this book was published. Foredge foxing and shallow loss of color to boards; a very good copy in a very good dust jacket with wear at the crown and a small sticker removal abrasion on the front panel. [#036489] $300