1849 Map of New England exhibiting the rail road &amp; telegraphic lines now in operation by Brown &amp; Hastings, George W. Boynton, Coolidge &amp; Wiley, from the Digital Commonwealth - commonwealth cj82kn67t. (<a rel="nofollow" class="external free" href="https://www.digitalcommonwealth.org/search/commonwealth:cj82kn67t">https://www.digitalcommonwealth.org/search/commonwealth:cj82kn67t</a>)
Brown &amp; Hastings, George W. Boynton, Coolidge &amp; Wiley
Digital Commonwealth