from Wikipedia (primary picture)	cultura.panorama.it	1901
1907 photograph (LoC Prints and Photographs, LC-USZ62-117475)	Underwood & Underwood	Image © ÖNB/Wien
Mark Twain with the actor John T. Raymond as Col. Sellers in Twain's dramatization of The Gilded AgeCourtesy of the…	Photo by Napoleon SaronyCourtesy of the NYPL Digital Gallery(image use requires permission from…	Photo by Alvin Langdon Coburn, 1908 (courtesy of the NYPL Digital Gallery; image use requires…
George Grantham Bain Collection, LoC Prints and Photographs Division (LC-DIG-ggbain-05462)	Lithograph by Joseph Ferdinand Keppler, 1885 (LoC Prints and Photographs Division, LC-USZC4-4294)	George Grantham Bain Collection, Library of Congress Prints and Photographs Division, Reproduction Number: LC-DIG-ggbain-02703
Library of Congress Prints and Photographs Division, LC-USZ62-112728	1907 photograph (Library of Congress Prints and Photographs Division, LC-USZ62-112065)	Twain in the lab of Nikola Tesla, spring of 1894.
Created: Constantinople : Abdullah Frères, 1867 (Library of Congress Prints and Photographs Division, Reproduction Number: LC-USZ62-28851)	Mark Twain(center) with David Grey on left and George Alfred Townsend on right (Brady-Handy Photographs, Library of Congress Prints and Photographs Division, Reproduction Number: LC-DIG-cwpbh-04761)	Mark Twain in New Hampshire, 1905 Photographer Unknown - From Internet