Keywords: Straight-edge owned by Henry David Thoreau, c. 1830 - Concord Museum - Concord, MA - DSC05642.JPG en Exhibit in the Concord Museum Concord Massachusetts USA 2014-12-30 13 33 04 own Daderot other versions PD-old-100 cc-zero Henry David Thoreau exhibits in the Concord Museum Straightedges |