Invoice for the transport of freight belonging to B. Roach on the steamboat S. S. Prentiss. Freight to be shipped down the Yazoo River includes slaves, tools, and general supplies.

Black and white lantern slide of a man reading the compass bearing on the deck of the S.S. Montello.

Black and white lantern slide (dark) of a sailor holding a carrier pigeon.

Black and white lantern slide of a line of steamship officers standing along a railing surveying the horizon with sextants.

Black and white lantern slide of the mast of the S.S. Montello.

Black and white lantern slide of the smokestack on the S.S. Montello.

Black and white lantern slide of the S.S. Excalibur docked in Genoa, Italy.

Black and white photograph of five men sitting and eating at a table in the officers mess of the Steamer Montello.

Black and white photograph of the steamship Fleetwood in the Bay of Gibraltar. The Rock of Gibraltar is barely visible in the distance.

Black and white photograph of a Robert H. Merrill reading the bearing of pigeon flight toward Cape Trafalgar.

Black and white photograph of four men painting the stack of the Steamer Montello.

Black and white photograph of seven people on the Steamer Montello. One man is standing on the upper walkway. Four men are standing on the lower walkway with one man standing at a window. One woman is visible in the window and another woman is…