 Viewed March 22, 2014. 220px|<center> Lewis and Clark Expedition1954 issue 220px|<center> John C. Frémont, Rockies1898 issue 220px|<center>John Wesley Powell, Green and Colorado Rivers1968 issue The Lewis and Clark expedition was celebrated on May 14, 2004, the 200th anniversary of its outset depicting the two on a hilltop outlook. Two companion 37-cent stamps showed portraits of Meriwether Lewis and William Clark. A special 32-page booklet accompanied the issue in eleven cities along the route taken by the Corps of Discovery. An image of the stamp can be found on Arago online at the link in the footnote."Bicentennial Lewis Clark Expedition Issue", Arago: people, postage%DIFDELCMD < & %%% the post, National Postal Museum online, viewed April 28, 2014.
<coherence>  Viewed March 22, 2014. 220px|<center> Lewis and Clark Expedition1954 issue 220px|<center> John C. Frémont, Rockies1898 issue 220px|<center>John Wesley Powell, Green and Colorado Rivers1968 issue The Lewis and Clark expedition was celebrated on May 14, 2004, the 200th anniversary of its outset depicting the two on a hilltop outlook. Two companion 37-cent stamps showed portraits of Meriwether Lewis and William Clark. A special 32-page booklet accompanied the issue in eleven cities along the route taken by the Corps of Discovery. An image of the stamp can be found on Arago online at the link in the footnote."Bicentennial Lewis Clark Expedition Issue", Arago: people, postage%DIFDELCMD < & %%% the post, National Postal Museum online, viewed April 28, 2014.
 Viewed March 22, 2014. 220px|<center> Lewis and Clark Expedition1954 issue 220px|<center> John C. Frémont, Rockies1898 issue 220px|<center>John Wesley Powell, Green and Colorado Rivers1968 issue Clark Expedition Issue", Arago: people, postage%DIFDELCMD < & %%% the post, National Postal Museum online, viewed April 28, 2014.