on the table , vast enough for a monastery refectory , there were maybe two dozen watch-works , coiled hearts pulsing , next to the open cases and the miniscule watch-repairing tools ; piles of unopened jig-saw puzzles , some in their original unbroken cellophane wrapping ; a scrap-heap of chinese puzzles , solved and undone , all of them ; seven chess-sets with the pieces in the position of his triumph over himself ; boxes of crayons and pencils ; reams of typewriting paper and everywhere those drawings with geometric figures .