After completing its yard work, Boston & Maine train CO-1 (Concord-Ayer and return) swings around the east wye at Ayer, MA, ready to head back to New Hampshire on a fall morning. Two GP9s are in charge.

Photographed by Tom Nelligan, November 19, 1979.
Added to the photo archive by Tom Nelligan, August 22, 2018.
Railroad: Boston & Maine.

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