Interior of sec.4, Tremont St., looking northerly

Sec.8, Elm St. looking towards Hanover

Interior sec.1, two track subway under Boylston Street mall

Interior, sec.1

Pipe crossing, sec.2ng toward Hanover

Sec.8, looking up Hanover St. from near Washington St.

Some steelwork in Haymarket Square, sec.10, Boston, Mass.

Steelwork in Haymarket Square, sec.10, looking southerly, Boston, Mass.

Part of sec. 2 at the corner of Tremont and Boylston Streets

Statue in Scollay Square, Boston, Mass., December 1, 1896

Easterly wall on sec.5 showing concrete

A frame on wheels at Hanover St. near Washington

Work on sec.5, looking northerly

Supporting the front of hotel carter, Tremont St.

Cracks in the Children's Mission Building, Tremont St.

Lamps at the entrance of the subway

Lamps at the entrance of the subway

Supporting Hotel Carter, Tremont St.

Incline at the corner of Hanover & Friends Sts. looking southerly

Sec.3 near sec.1 in Tremont St. mall, looking southwest

Interior of sec.10, working southerly

Interior of sec.10, looking southerly from near Haymarket Sq.

Interior of sec.6, looking northerly opp. Boston Museum

Sec.5, showing amount of Tremont St. occupied

Sec.5, showing amount of Shawmut Ave. occupied

Sec.5, showing northerly

Sec.5, looking northerly from Corner of Pleasant St. + Shawmut Ave.

Work at the corner of Washington + Hanover Sts., looking south

In sidewall trench, sec.8, Hanover St.

Pipe-crossing opp. west St., sec.3

Interior of sewer siphon under Haymarket Sq. looking east

Tunnel for sewer siphon under Hanover St. across Washington, sec.9

Edison pipe crossing in Haymarket Sq., looking east

Edison pipe crossing in Haymarket Sq., looking west

Model of shield

Under Hanover St. sec.T

Double ventilating chamber corner of Washington + Hanover Sts.

Electric conduit and pipes at corner of Boylston + Tremont Sts.

Some details under Tremont Street near Boylston looking north

View in Haymarket Square, work on sec.10, Boston, Mass.

Interior of lower story of sec.6

Interior of sec.8 under Hanover St.

Pipe-crossing on sec.3 opp. West St.

Some steelwork on sec.10

Pipe-crossing of sec.8 opp. West St.

Steelwork of pipe-crossing in Haymarket Sq.

Excavation in Haymarket Sq., sec.10, looking northerly

Escavation in Haymarket Sq., sec.10, looking southwest

Birdseye view of sec.3

Bracing in trench at section 2 on Boylstion Street mall, looking westerly