It in turn is flanked by two small bays, each with a small pointed pediment supported by shallow pilasters, which further emphasise and complement the central broken pediment sitting above a large Palladian window – the focal point of the building. On this southern side the structure comprises a principal floor at street level, with a low mezzanine separated by stone banding above. Beneath the principal floor is a sub-floor constructed in the masonry between the spans of the bridge, its presence indicated by ocular windows placed symmetrically beneath the span of each arch.