One of the earliest surviving railroad maps in US.  Sharp map of the potential railroad routes explored between Boston and Providence.  At the time these surveys were comissioned by the board of the railroad to generate funding from investors.  The map explores several routes and that then was separately used to establishing the cost.  The report was issued in 1832.  Follows a similar survey from 1828.  Uncolored.  Reference: Cartographies of Travel and Navigation, James R Ackerman