We are at Patterson Road in Shirley , MA and the light is low because of the early hour and overcast. The approach signals for Ayer Interlocking are lit. B&M GP-9 #1734 leads five other "bluebirds" as they slowly lug their train up out of the Nashua valley.

Photographed by Ron DeFilippo, 1984.
Added to the photo archive by Ron DeFilippo, November 27, 2019.
Railroad: Boston & Maine.

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