This image is from a glass plate copy negative taken by John Reid, photographer, Paterson New Jersey (as written on the image copied on this plate), and modified by him to remove the background above the tracks from the image.  This is a 19th c. version of Photoshop.  The image has been printed in Chicago by photographer Christopher Kean, Nice Card Company.  

The locomotive builder is the Rogers Locomotive and Machine Works, Paterson, New Jersey.  

The D. T. & F.-W. Railroad was incorporated in April 1887, and by 1888 had acquired the Denver & Fort Worth City Railway, providing a route from Denver to the Gulf (Texas).  In 1890 this became part of the Union Pacific.  See Wilbur Fiske Stone, History of Colorado, v. 1 (Denver: S. J. Clark, 1918), 368:    http://books.google.com/books?id=-uVYAAAAMAAJ&lpg=PA368&ots=QoTmIbUI2u&dq=denver%20texas%20%26%20fort%20worth&pg=PA368#v=onepage&q=denver%20texas%20&%20fort%20worth&f=false  

The glass plate is part of the library's 1970s received donation from the family of rialroad photography collector Munson Paddock.  It was originally identified by Glenn Guerra and Ray Burmaster, 1990s.  

Reid, John (1835-1911)

Kean, Christopher