si-national-portrait-gallery:Zebulon Montgomery Pike, Unidentified Artist, c. 1817-1822, Smithsonian
si-national-portrait-gallery:Zebulon Montgomery Pike, Unidentified Artist, c. 1817-1822, Smithsonian: National Portrait GallerySize: Image: 8 x 7.9cm (3 1/8 x 3 1/8")Medium: Line and stipple engraving on paperhttp://npg.si.edu/object/npg_S_NPG.80.15 -- source link
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