Sentence:  A very neat old woman, still in her good outdoor coat and best beehive hat, was sitting at a polished mahogany table on whose <WSD>surface</WSD> there were several scored scratches so deep that a triangular piece of the veneer had come cleanly away,nb.... 
Meaning of the word marked with <WSD> tags:  The overside or up-side of a flat object such as a table, or of a liquid.