The Pit-Prop Syndicate by Freeman Wills Crofts

For several days Merriman, sick at heart and shaken in body, remained on at Bordeaux, too numbed by the blow which had fallen on him to take any decisive action. He now understood that Madeleine Coburn had refused him because she loved him, and he vowed he would rest neither day nor night till he had seen her and obtained a reversal of her decision. But for the moment his energy had departed, and he spent his time smoking in the Jardin and brooding over his troubles.

It was true that on three separate occasions he had called at the manager's house, only to be told that Mr. and Miss Coburn were still from home, and neither there nor from the foreman at the works could he learn their addresses or the date of their return. He had also written a couple of scrappy notes to Hilliard, merely saying he was on a fresh scent, and to make no move in the matter until he heard further. Of the Pit-Prop Syndicate as apart from Madeleine he was now profoundly wearied, and he wished for nothing more than never again to hear its name mentioned.