Sudbury River Conduit, B.W.W., div. 4, sec. 15, Nov. 13, 1876. Brickmason gang at the east end of section 16.

Sudbury River Conduit, B.W.W., div. 4, sec. 15, Nov. 13, 1876. View from inside of conduit; brickmasons at work in the east terminal chamber of bridge.

Sudbury River Conduit, B.W.W., div. 4, sec. 17, Nov. 13, 1876. View of brickmason gang, near rock cut, west of Walnut St.

Sudbury River Conduit, B.W.W., div. 4, sec. 16, Oct. 18, 1876. View taken at the east end of rock cut looking west.