| Davis & Co. Trade card for Davis & Co.'s Original 25 Cent Ambrotype Rooms, corner Winter & Washington Street, Boston, Mass. n.d. Trade card 2 1/4 x 2 ins Historic New England Ephemera collection, EP001, Gift of Samuel Hammond, 5 February 1925, GUSN 265602 LL/67747 Davis & Co. (Boston, Mass.)
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