1907 Tri-state trolley map showing Boston &amp; Northern and Old Colony Street Railway Companies' systems and connecting lines, from the Digital Commonwealth - commonwealth gx41q249c.
Boston &amp; Northern and Old Colony Street Railway Companies
Digital Commonwealth (<a rel="nofollow" class="external free" href="https://www.digitalcommonwealth.org/search/commonwealth:gx41q249c">https://www.digitalcommonwealth.org/search/commonwealth:gx41q249c</a>)