From the 1923 “Annual Report of the Public Trustees of the Boston Elevated Railway”:
“Looking elsewhere to the north, the present transfer station at Lechmere Square, itself part of a decided improvement in the former service between Boston and Cambridge and Somerville, is not fitted to be a permanent transfer station, and while being used as such must fail to satisfy. There should be an extension of rapid transit to some point beyond, where a permanent transfer station can be located that will adequately meet present and future needs.”
Yes, we agree! (Thanks Bob Sawyer for this tidbit.)