Pontoon Bridge over the Potomac. Maryland heights in the distance and Baltimore and Ohio R.R.

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Pontoon Bridge over the Potomac. Maryland heights in the distance and Baltimore and Ohio R.R. Date Created/Published: between 1860 and 1865. The war pictures provided by LOC. Original medium: 1 drawing on green paper : pencil and Chinese white ; 17.4 x 21.4 cm. (sheet).