A 19th century Chinese export pierced ivory puzzle

A 19th century Chinese export pierced ivory puzzle, in a pierced covered box containing six segments to make two squares, 2in (5cm) sq, another puzzle in wooden blocks contained within a Tunridgeware style box, the underside inscribed 'Charles Aitken, Broduff, 7 Blooomsbury Square, London, WC', together with a small pamphlet 'The Chinese Puzzle'. (3)