"Drive on!" screamed Van Hupfeldt to his coachman, and, the block of traffic having now cleared, the horses trotted on, and left David red-faced with fury, in imminent danger of being run over by the press of vehicles behind. CHAPTER XII THE NIGHT-WATCHES David returned home angry with himself in all ways, not least for his loss of self-control in pursuing Van Hupfeldt with no object but to vent himself in mere threats. His suggestion to Van Hupfeldt that other documents besides the certificates might be hidden among the picture-frames in the flat was in the tone of a child's boasting. One should find first, he told himself, and boast afterward. However, one of Mrs. Grover's excellent little lunches put him straight, and, though work was a thousand miles from his mood that day, he compelled himself to do it, and the pen began to run. But first he had said to Mrs. Grover: "I want you to get the steps, and take down every picture in the flat, except the three big ones, which I will see to myself." Then, with his flower-pot of violets on each hand, he was soon in the thick of the cow-boy and prairie-flower history which he had on hand. His stories were already known on this side by the whiff of reality they brought from the States, and were in some demand. Already the postman handed him printers' proofs, and he had proved to himself that he possessed some of the wisdom of the serpent in choosing a reputable abode, because the men whom he entertained went away saying: "Harcourt has private means. He has taken to literature as a hobby," an idea which made him popular. If certain editors, on the strength of it, wished to pay him half-rates, they were soon undeceived. David was much too hard a nut to crack in that easy way. Meantime, neither by sight nor sound had he been reminded of the eery experience of his first night in No. 7. True, there were noises during the still hours, such as had twice thrilled Miss L'Estrange and Jenny. But they seemed quite natural to him. The dryness of the interior of the block of flats had loosened flooring-boards and dislocated cross-beams, until the mere movement of an article of furniture overhead, or the passing of a next-floor tenant from one room to another, would set going creaks enough to give rise to half a dozen ghost-panics.