bit of black paper on the other side of the glass for the purpose. The bowl comes from Manderson's room. It is the bowl in which his false teeth were placed at night. I could bring that away, so I did.'
'But those cannot be Mabel's finger-marks.'
'I should think not!' said Trent with decision. 'They are twice the size of any print Mrs. Manderson could make.'
'Then they must be her husband's.'
'Perhaps they are. Now shall we see if we can match them once more? I believe we can.' Whistling faintly, and very white in the face, Trent opened another small squat bottle containing a dense black powder. 'Lamp-black,' he explained. 'Hold a bit of paper in your hand for a second or two, and this little chap will show you the pattern of your fingers.' He carefully took up with a pair of tweezers one of the leaves cut from his diary, and held it out for the other to examine. No marks appeared on the leaf. He tilted some of the powder out upon one surface of the paper, then, turning it over, upon the other; then shook the leaf gently to rid it of the loose powder. He held it out to Mr. Cupples in silence. On one side of
