1847 Map of parts of Middlesex &amp; Essex counties, showing the rail road routes between Salem, Lowell, Boston &amp; Methuen, by George B. Parrott, Samuel Nott, Ephraim W. Bouvé, from the Digital Commonwealth - commonwealth 9g54xk44k. (<a rel="nofollow" class="external free" href="https://www.digitalcommonwealth.org/search/commonwealth:9g54xk44k">https://www.digitalcommonwealth.org/search/commonwealth:9g54xk44k</a>)
George B. Parrott, Samuel Nott, Ephraim W. Bouvé
Digital Commonwealth