File:Chet thomas showing the signs.jpg

Cropped from the newspaper shown. Chet Thomas showing the signs he gives the runner. Taken in 1921.

The Corpus Christi caller. (Corpus Christi, Tex.), 09 April 1921. Chronicling America: Historic American Newspapers. Lib. of Congress. <http://chroniclingamerica.loc.gov/lccn/sn86071134/1921-04-09/ed-1/seq-6/>

The two-dimensional work of art depicted in this image is in the public domain in the United States, either because it was first published before 1929, or for the reason described either above or below this template. This photograph of the work is also in the public domain in the United States (see Bridgeman Art Library v. Corel Corp.).
Note: Unless the creator died more than 70 years ago, the work of art is not public domain worldwide.