Ticket for the 1905 Lewis and Clark Exposition in Portland, Oregon, signed by Thomas Robertson (1881-1924). The reverse of the ticket includes a photograph of Robertson wearing a hat and suit.

Souvenir ticket for the Lewis and Clark Centennial exhibit from 1905, in Portland, Oregon. On the front of the ticket is a decorative illustration, showing Sacajawea, Meriwether Lewis, William Clark, the ship Columbia, and the Oregon Pony. The back of the ticket is individually numbered, with additional text.