Results for "Twitter"
Charles D. Walcott at Grand Canyon
- Date: 1915
- Creator: Unknown
- Creator: Unknown
Major John Wesley Powell
- Creator: Unknown
- Creator: Unknown
- Web Page
Charles D. Walcott in Field with Horses
- Date: c. 1920
- Creator: Unknown
- Creator: Unknown
Fielding Bradford Meek
- Date: c. 1850s
- Creator: Unknown
- Creator: Unknown
Major John Wesley Powell
- Date: 1879
- Creator: Unknown
- Creator: Unknown
Major John Wesley Powell
- Date: c. 1879
- Creator: Unknown
- Creator: Unknown
Charles Doolittle Walcott Excavating Burgess Shale
- Date: c. 1915
- Creator: Unknown
- Creator: Unknown
William Healey Dall's Wagner Free Institute of Science Medal
- Date: 1899
- Creator: Unknown
- Creator: Unknown
William and Lucile Mann in British Guiana on a collecting trip for the National Zoological Park
- Date: 1931
- Creator: Unknown
- Creator: Unknown
Stevenson and Dawes of Hayden's Expedition
- Date: 1871
- Creator: Unknown
- Creator: Unknown
Theodore Roosevelt on African Expedition
- Date: 1909
- Creator: Unknown
- Creator: Unknown
Hotel Pinho, Brazil
- Date: 1929
- Creator: Unknown
- Creator: Unknown
