Philadelphia State Hospital at Byberry€¦ · -small. pent.house venti large d eta i l s top roof...
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Philadelphia State Hospital at Byberry€¦ · -small. pent.house venti large d eta i l s top roof up roofing top. of roof l'-on 33 sca z. e - 'n slab asr. 3" 4." vent but l? top
