Building cor. Lowell and Causeway Sts. North Station canopy and stairs Canopy at North Station Canopy at North Station 23 Willard St. Party wall between 13+15 Barton St. Party wall Lowell St. n. of Willard St. Party wall, Billerica St. near Causeway St. Party walls, Lowell near Causeway St. Party wall between 14+16 Barton St. Party wall n. side Barton St. S.e. from Brighton St. shows where buildings have been torn down N.w. across Lowell, Minot, Willard, Brighton Sts. E. side of Lowell St. near Causeway St. Wall between 14-16 Barton St. Wall between 14-16 Barton St. Underpinning party wall between 6+8 Lowell St. Underpinning party wall between 6+8 Lowell St. Underpinning party wall between 6+8 Lowell St. Causeway St. opposite North Station Steel erection North Station New steel work opposite North Station New steel work North Station Progress view on steel erection North Station Props and showing on building Billerica near Causeway St. Progress on steel erection North Station Lechmere Sq. Progress on steelwork North Station North Station, progress on steelwork North Station, progress view Foor bridge through B+M cabstand, North Station North Station, progress view Progress view opposite North Station North Station, subway incline Lechmere Sq. incline Progress view North Station Progress view North Station Progress view North Station Progress at North Station Progress view North Station galleries etc. Progress view North Station Charles River Bridge bunter at draw 12 Lowell St. 12 Lowell St. from top of elevated railway structure Charles River Bridge Lechmere Sq. incline frozen concrete Lechmere Sq., effects of frost Looking north on Tremont Street mall second row, beginning at 163, Boston, Mass. Birdseye view looking westerly from Walker's Building Looking east in Public Garden