On a bleak fall day, a loaded Bow coal train rolls through Ayer, MA, behind a grimy Boston & Maine GP9 and three Penn Central units (GP40/GP40/GP35). When these trains started up in the mid-1960s, a B&M diesel always had to lead to trigger the cab signals that were then in use on the Fitchburg Division between West Cambridge and East Deerfield.

Photographed by Tom Nelligan, November 23, 1969.
Added to the photo archive by Tom Nelligan, December 6, 2017.
Railroad: Boston & Maine.

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