Agatha Christie

“ I realized, of course, that these films might very well be an old roll belonging to Sir Eustace Pedler which had rolled in here and had not been found when the cupboard was emptied. But I did not think so. The red paper was far too fresh-looking. It was just as dusty as it would have been had it laid there for two or three days—that is to say, since the murder. Had it been there for any length of time, it would have been thickly coated.
Who had dropped it? The woman or the man? ”

“ If he had no camera, why should he be carrying a roll of films?
I set out early next morning to take my precious roll to be developed. I was so fussy that I went all the way to Regent Street to the big Kodak place. I handed it in and asked for a print of each film. The man finished stacking together a heap of films packed in yellow tin cylinders for the tropics, and picked up my roll. ”

“ If it had been jerked open in the struggle and the roll of films had fallen out, surely some of the loose money would have been scattered about also? No, it was not the woman who had dropped the films. ”