The J. Paul Getty Museum
License, verbatimCC0
The J. Paul Getty Museum: image dedicated to the public domain under Creative Commons Zero (CC0), stated on the media record itself ('Rights for Media'), with download clearance.
Elias Olcott Beaman. Trinalcove. This canon is 55 1/2 miles long and from 300 to 2,000 feet deep. [Green River. Labyrinth Canon.], about 1871–1872. The J. Paul Getty Museum.