‘Take a look around and see if the other rooms are more sociably equipped, and do try not to destroy any clues.’
‘Everything is a clue’, I reminded him.
‘Remember that and you might be slightly less of a nuisance.’ He crawled round the desk. ‘This is only the second time I have come across this type of varnish used on walnut veneer.’ He lay on his back with his arms stiff at his sides. ‘What is the easiest way to give somebody poison?’