Réponse :

Holmes : What were you doing at 9 last night ?

Mrs Chandler : I was cleaning the table in the dining-room

Mr Perry : They was playing Chess

Holmes : So what did you do at 9 last night ?

Pullman : Er... Let me think... I played chess with my apprentice.

Holmes : Oh no ! You certainly didn't chess. There's only one chessboard in the house and the butler played chess with Mr.Perry, So you're lying !

Explications: