Pompey's Pillar ID: 5991 | This file appears in: Pompeys Pillar Photo of William Clark's name carved in rock. | Creator: Tom Ferris, photographer | Date: 6 October, 2021 | Source: Montana Historical Society | Rights: Photos may not be re-used without written permission of MHS Photograph Archives. This material may be protected by copyright law (Title 17 U.S. Code) Download Original File CreatorTom Ferris, photographerSourceMontana Historical SocietyDate6 October, 2021RightsPhotos may not be re-used without written permission of MHS Photograph Archives. This material may be protected by copyright law (Title 17 U.S. Code) "Pompey's Pillar" appears in: Pompeys Pillar