Buffalo Bill's Wild West Show - Stamps

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29-cent Buffalo Bill Cody mini sheet stamp
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29-cent Annie Oakley mini sheet stamp
 
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28-cent Sitting Bull stamp
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29-cent Wild Bill Hickok mini sheet stamp
 

These stamps represent real people from the past. Buffalo Bill, founder of Buffalo Bill's Wild West Show, traveled around the world doing western shows with Annie Oakley, Wild Bill Hickok, and Sitting Bull, a Dakota Sioux Indian.

Three of these stamps are very colorful and cost 29 cents each, and one stamp is monochromatic (one color) and 28 cents; do you think any one of these stamps is a primary source for the 1800s?

Remember, you are now a historian and need to look at all of the details provided to make the correct choices. Make your selection wisely and explain each one.