File:Mr. Paul Du Chaillu Lecturing to the Young Folks of Boston.jpg
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![File:Mr. Paul Du Chaillu Lecturing to the Young Folks of Boston.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/4/4d/Mr._Paul_Du_Chaillu_Lecturing_to_the_Young_Folks_of_Boston.jpg/800px-Mr._Paul_Du_Chaillu_Lecturing_to_the_Young_Folks_of_Boston.jpg?20160717150714)
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