Platinum print of the shore of the Columbia River near Castle Rock (today known as Beacon Rock). Attributed to Sarah Hall Ladd.

Platinum print of Lily E. White's houseboat, the Raysark, moored near Castle Rock (today known as Beacon Rock) on the Columbia River. Attributed to Sarah Hall Ladd.

Platinum print of Castle Rock (today known as Beacon Rock) on the Columbia River. Handwritten note on the back of the print reads, "Castle Rock - Columbia" This photograph has been attributed to both Sarah Hall Ladd and Lily E. White. Signed, "Lily E. White," in the lower right corner of the print.

Platinum print of an unidentified person standing in a rowboat on the Columbia River. Castle Rock (today known as Beacon Rock) is visible in the distance. Handwritten inscription on the back of the print reads, "Twilight on the Columbia - Castle Rock in the Distance." This photograph has been attributed to both Sarah Hall Ladd and Lily E. White. Signed, "Copyrighted by Lily E. White," in the lower right corner of the print.

Platinum Print of a houseboat moored at the base of Castle Rock (today known as Beacon Rock) on the Columbia River. Handwritten inscription from the back of the print reads, "Castle Rock - Columbia." Signed, "Copyrighted 1902, Lily E. White," in the lower right corner of the print.

Platinum Print of Castle Rock (today known as Beacon Rock) looking north from Mosquito Island (today known as Peirce Island). Handwritten inscription on the back of the print reads, "Castle Rock Looking North - Columbia." This print is sometimes published as, "Mosquito Island." Signed, "Lily E. White," in the lower right corner of the print.