[Image of the APD night watchman's clock]


[Image of the APD night watchman's clock], Photograph, 1930; (http://texashistory.unt.edu/ark:/67531/metapth176219/ : accessed February 08, 2016), University of North Texas Libraries, The Portal to Texas History, http://texashistory.unt.edu; crediting Arlington Public Library , Arlington, Texas.

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