The Pit-Prop Syndicate by Freeman Wills Crofts

The failure of the attempt to learn the secret of the Pit-Prop Syndicate affected Merriman more than he could have believed possible. His interest in the affair was not that of Hilliard. Neither the intellectual joy of solving a difficult problem for its own sake, nor the kudos which such a solution might bring, made much appeal to him. His concern was simply the happiness of the girl he loved, and though, to do him justice, he did not think overmuch of himself, he recognised that any barrier raised between them was the end for him of all that made life endurable.

As he lay back with closed eyes in the corner seat of a first-class compartment in the boat train from Calais he went over for the thousandth time the details of the problem as it affected himself. Had Mr. Coburn rendered himself liable to arrest or even to penal servitude, and did his daughter know it? The anxious, troubled look which Merriman had on different occasions surprised on the girl's expressive face made him fear both these possibilities. But if they were true did it stop there? Was her disquietude due merely to knowledge of her father's danger, or was she herself in peril also? Merriman wondered could she have such knowledge and not be in peril herself. In the eyes of the law would it not be a guilty knowledge? Could she not be convicted as an accessory?