Sudbury River Conduit, B.W.W., div. 4, sec. 15, Nov. 13, 1876. View of arches "A," "C," "D," and "E" with centrings from house above Ellis St. |
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Sudbury River Conduit, B.W.W., div. 4, sec. 15, Oct. 18, 1876. View of central portion of large centring showing jack screws. |