Northwest corner of Poros Building. Looking east showing basin in northwest corner, for numbers on block see page 1719 ... AMS Horizontal (normal)
Northwest corner of Poros Building. Looking east showing basin in northwest corner, for numbers on blocks see page 1719. Looking west. Block 4 of North Wall and small poros drain to right only partially ... AMS Horizontal (normal)
Northwest corner of Poros Building. Looking southwest. Drain cover slab at left-right ... AMS Horizontal (normal)
Northwest corner of Poros Building. Drain cover slab at left-right, looking east ... AMS Horizontal (normal)
