Relaying Track at Boylston and Cypress Sts.

Sullivan Sq. Shops Wheel Lathe Gear Case Raised

Main St. Kendall Sq.

Looking Westerly in Grove St.

Castle St. Y. and New Structure Toward Washington St. Tunnel

Starter Office Sullivan Sq. Southbound Platform

Setting Pedestal opp. Forest Hills Car House Foundation #818 E

Beacham St. Yard Progress Under

Chart, East Cambridge Power Station

Buildings 284-290 Boylston St.

Looking Ely. along Back St. from Mass. Ave.

Junction of Brattle St. and Mass. Ave. St. Occupancy

Underpinning Building Mass. Ave. N. of Columbia St.