Street-level view south-southeast of workers pouring cement during the construction of pedestrian tunnels underneath Haymarket Square near Blackstone Street. Onlookers watch as construction workers pour cement. Signage adorns the northwest and northeast elevations of the building located at the intersection of Union and Blackstone Streets and Haymarket Square. A building lining the southwest ... read moreside of Union Street is visible near the upper-right corner of the photograph. 6 3/8 x 8 5/16, 6 15/16 x 8 15/16 overall Photographsread less