Formal portrait of <a href="https://en.wikipedia.org/wiki/Thomas_Condon" class="extiw" title="en:Thomas Condon">Thomas Condon</a> (1822–1907), a minister and geologist who gained recognition for his work in paleontology. He is especially known for his work with fossils in what became <a href="https://en.wikipedia.org/wiki/John_Day_Fossil_Beds_National_Monument" class="extiw" title="en:John Day Fossil Beds National Monument">John Day Fossil Beds National Monument</a> in the U.S. state of <a href="https://en.wikipedia.org/wiki/Oregon" class="extiw" title="en:Oregon">Oregon</a>.
unknown photographer; scanned, cropped, and retouched by <a href="//commons.wikimedia.org/wiki/User:Finetooth" title="User:Finetooth">User:Finetooth</a>
1910
McCornack, Ellen Condon, ed.; Condon, Thomas (1910). <i>Oregon Geology: A Revision of "The Two Islands" with a Few Tributes to the Life and Work of the Author.</i> Portland, Oregon: The J.K. Gill Company. Frontispiece. OCLC 6113027