Highland Branch
... that locomotives completed a circuit on the Boston and Albany Railroad's Highland Branch?
... that locomotives completed a circuit on the <a href="./Boston_and_Albany_Railroad" id="mwBbs" rel="mw:WikiLink" title="Boston and Albany Railroad">Boston and Albany Railroad</a>'s <b id="mwBbw"><a class="mw-redirect" href="./Highland_Branch" id="mwBb0" rel="mw:WikiLink" title="Highland Branch">Highland Branch</a></b>?