Photograph of the General Lytle Steamboat.
Steamboats like this carried passengers, supplies, and mail across the United States. This is a primary source because it was photographed around 1877.
Photograph of the Morning Star Steamboat.
This photograph is a primary source too because it was actually taken during its journey on the Ohio river.
Photograph of the U.S Mail Packet Chesapeake Steamboat.
Is this photograph a primary or secondary source? Explain your answer.