Photo of a Large Crowd on 4th Street Possibly Watching Firemen Battling a Building Fire in St. Louis, Missouri (1868)

View of a large crowd on 4th Street possibly watching firemen battle a building fire in St. Louis, Missouri, c. 1868. Note the stream of water in the street gutter in the foreground which probably is coming from the firemen's efforts. Originally published as a stereoview.
 

Source: Missouri Historical Society.

Union Soldiers of the Guthrie Grays Battalion on Parade Along 4th Street in Cincinnati (1861)

Union soldiers of the Guthrie Grays Battalion on parade along 4th Street in Cincinnati, 1861. The unit went on to form the basis of the Sixth Ohio Volunteer Infantry Regiment.

Source.