18 3/4 x 14 1/2 in. albumen photograph on 21 7/8 x 17 3/4 in. cardstock mount. Whipple's credit, title, and copyright statement printed to mount recto.

Pictured is a large crowd of attendants of the National Council of Congregational Churches, held in Boston in June of 1865. The group took a trip to Plymouth Rock on 22 June, when this portrait was captured along the waterfront. Clapboard buildings in the background feature signs reading "F.B. Cobb," and "Pratt and Drew, Flour & Grain."