The knoll where Custer fell

• Creator: Gedney, C. D., artist; Date Created/Published: [between 1881 and 1887
• Medium: 1 drawing : pencil, ink wash and opaque white. Library of Congress

Valley of the Little Big Horn; Creator(s): Gedney, C. D., artist; Date Created/Published: [between 1880 and 1887]; Medium: 1 drawing on paper with lithotint : pencil and ink.

• Maj Cutter's ranch at the Custer battlefield; Creator(s): Gedney, C. D., artist; Date Created/Published: [between 1880 and 1887]; Medium: 1 drawing : pencil, charcoal, ink wash and opaque white.

from the Civil War to Silicon Valley -- Neil DeGrasse Tyson on Abraham Lincoln