<i>This work is in the <b><a href="https://en.wikipedia.org/wiki/public_domain" class="extiw" title="w:public domain">public domain</a></b> because it was published in the United States between 1928 and 1963, and although there may or may not have been a copyright notice, the <b><a href="https://en.wikipedia.org/wiki/Copyright_renewal_in_the_United_States" class="extiw" title="w:Copyright renewal in the United States">copyright was not renewed</a></b>. For further explanation, see <a href="//commons.wikimedia.org/wiki/Commons:Hirtle_chart" title="Commons:Hirtle chart">Commons:Hirtle chart</a> and <a rel="nofollow" class="external text" href="http://onlinebooks.library.upenn.edu/cce/">the copyright renewal logs</a>.  Note that it may still be copyrighted in jurisdictions that do not apply the <a href="https://en.wikipedia.org/wiki/rule_of_the_shorter_term" class="extiw" title="w:rule of the shorter term">rule of the shorter term</a> for US works (depending on the date of the author's death), such as Canada (50 years <a href="https://en.wikipedia.org/wiki/List_of_Latin_phrases_(P)#Post_mortem_auctoris" class="extiw" title="w:List of Latin phrases (P)">p.m.a.</a>), Mainland China (50 years p.m.a., not Hong Kong or Macao), Germany (70 years p.m.a.), Mexico (100 years p.m.a.), Switzerland (70 years p.m.a.), and other countries with individual treaties.</i>
Uncredited photographer
Horses in the blue grass / by Bert Clark Thayer (1947), p <a rel="nofollow" class="external text" href="http://hdl.handle.net/2027/wu.89052499548?urlappend=%3Bseq=34">24</a>