Paddock 602: "Tiger" steam locomotive of the Whitneyville and Machiasport Railroad. 

The "Tiger" steam locomotive, 0-4-0 wheel type, of the Whitneyville & Machiasport (Maine) Railroad, appears to have been photographed for a November, 1907, article on the recently dismantled line by Railway and Locomotive Engineering.  A related photograph, with the same two gentlemen standing in different positions as in one posing on the "Lion," a sibling of the "Tiger," on the Catskill Archive website: http://www.catskillarchive.com/rrextra/wmme.Html .  Here is the story transcribed and mmounted with the apparently halftone image.

The "Tiger," according to the article, was the second engine on the Maine line, one of the first in the state, ca. 1840-41, following a British-built locomotive, the "Phenix" that had been shipped from Boston's Hinkley & Drury, shipped to Machiasport in 1842.  Perhaps from this as a model the "Tiger" was built and shipped, and then the sibling "Lion" in 1842-43.  

This photograph of ca. 1907 has recorded a locomotive that was part of the birth of northern New England railroading, ten or twelve years after  the first U.S. train run, 1829. 

The image is small (approx. 2.5" by 5"), black & white, with a small hole torn in it, and with the penciled note on the back in a workman's (vs. librarian's) hand: "Tiger of Whitneysville [sic] & Machaisport."  The plate with the name "Tiger" is clearly seen in the image on the boiler.