Old portal openings below the retaining walls. | Gwulo: Old Hong Kong

Old portal openings below the retaining walls.

Old portal openings below the retaining walls.
Were these old portals and arches part of the foundations of the previous mansion that stood there I wonder? Anyone got a photograph of how this street or area used to look before it was cleared and demolished quite a few years back?
Date picture taken (may be approximate): 
Monday, January 16, 2012
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