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 taken below bridge from Newton side, showing the six completed arches.

Sudbury River Conduit, B.W.W., div. 4, sec. 15, Nov. 13, 1876. View of south side of east abutment of arch "A", and of arches "C" and "D".

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. 15, Nov. 13, 1876. South side of bridge from Newton side (centerings of arches "F" and "G" removed).

Sudbury River Conduit, B.W.W., div. 4, sec. 15, Nov. 13, 1876. View of south side view of arches "A" and "C" with centrings.

Sudbury River Conduit, B.W.W., div. 4, sec. 15, Nov. 13, 1876. View of south side of east abutment of large arch with half of arches "A" and "C".

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.

Sudbury River Conduit, B.W.W., div. 4, Nov. 13, 1876. View inside of engineer's office at Newton Upper Falls, Mass.

Sudbury River Conduit. B.W.W. Div. 4, Sec. 16 Nov. 14, 1876, view at east end of Sec. 16 showing excavating con..., stone and brick masons.

Sudbury River Conduit, B.W.W., div. 4, sec. 17, Nov. 13, 1876. View near rock-cut on sec. 17 showing ledgemen in the foreground and brickmasons in the background.

Sudbury River Conduit, B.W.W., div. 4, sec. 17, Nov. 13, 1876. View near rock-cut showing ledgemen in the foreground and brickmasons in the background.

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. 15, Oct. 18, 1876. View of central portion of large centring showing jack screws.

Sudbury River Conduit, B.W.W., div. 4, sec. 15, Oct. 18, 1876. View taken from the top of arch "D" and looking west.