<p>Fox-Trot sheet music, with photographs of Charles 
and Ivah Will Coburn in rear windows of a subway car.
</p>
Music Division, New York Public Library
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/30484128@N03">Off-line for a while -- Jim Griffin</a>
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/30484128@N03/51963473870/">Bronx Express -- 1922</a>