The Orange-Yellow Diamond (Paperback)

Very well, continued Purdie. "Then I want to make a suggestion to you. It seems to me that the wisest course is for you and me to go straight to the police authorities, and tell them frankly that Lauriston has gone to get evidence that those rings are really his property, and that he'll return in a day or two with that evidence. That will probably satisfy them--I think I can add a bit more that will help further. We don't want it to be thought that the lad's run away rather than face a possible charge of murder, you know "