A 1910 map of a proposal to build a 4-track tunnel under Salem, part of plans to quad-track and grade-separate the Eastern Route as far as Beverly
Unknown author<span style="display: none;">Unknown author</span>
<a rel="nofollow" class="external text" href="https://www.newspapers.com/clip/46690809/the-boston-globe/">Boston Globe, December 20, 1910</a>