upper left in pen and brown ink: N.; lower right in pen and brown ink: White Mts. Aug. 9-1860-from Fernald's Hill.; by unknown hand along left edge verso in graphite: APG19252D.102
- Ross, Zachary D. Charles De Wolf Brownell: A Decade of Travel, 1856-66. Exh. cat. Hirschl & Adler Galleries, Inc., New York, 2004: 22, no. 67.