He wished first to assure himself that Cuthbert was within call, and to that end put out the lights and drew aside the curtains that covered the window. Outside, the fog was rolling between the house-fronts, both rain and snow were falling heavily, and a solitary gas-lamp showed only a deserted and dripping street. Cautiously Ford lit a match and for an instant let the flame flare. He was almost at once rewarded by the sight of an answering flame that flickered from a dark doorway. Ford closed the window, satisfied that his line of communication with the outside world was still intact. The faithful Cuthbert was on guard.

Ford rapidly reviewed each possible course of action. These were several, but to lead any one of them to success, he saw that he must possess a better acquaintance with the interior of the house. Especially was it important that he should obtain a line of escape other than the one down the stairs to the front door. The knowledge that in the rear of the house there was a means of retreat by a servants' stairway, or over the roof of an adjoining building, or by a friendly fire-escape, would at least, lend him confidence in his adventure. Accordingly, in spite of Prothero's threat, he determined at once to reconnoitre. In case of his being discovered outside his room, he would explain his electric bell was out of order, that when he rang no servant had answered, and that he had sallied forth in search of one. To make this plausible, he unscrewed the cap of the electric button in the wall, and with his knife cut off enough of the wire to prevent a proper connection. He then replaced the cap and, opening the door, stepped into the hall.

The upper part of the house was, sunk in silence, but rising from the dining-room below, through the opening made by the stairs, came the voices of Prothero and Pearsall. And mixed with their voices came also the sharp hiss of water issuing from a siphon. The sound was reassuring. Apparently, over their whiskey-and-soda the two men were still lingering at the dinner-table. For the moment, then—so far, at least, as they were concerned—the coast was clear.

Stepping cautiously, and keeping close to the wall, Ford ran lightly up the stairs to the hall of the third floor. It was lit brightly by a gas-jet, but no one was in sight, and the three doors opening upon it were shut. At the rear of the hall was a window; the blind was raised, and through the panes, dripping in the rain, Ford caught a glimpse of the rigid iron rods of a fire-escape. His spirits leaped exultantly. If necessary, by means of this scaling ladder, he could work entirely from the outside. Greatly elated, he tiptoed past the closed doors and mounted to the fourth floor. This also was lit by a gas-jet that showed at one end of the hall a table on which were medicine-bottles and a tray covered by a napkin; and at the other end, piled upon each other and blocking the hall-window, were three steamer-trunks. Painted on each were the initials, “D. D.” Ford breathed an exclamation.

“Dosia Dale,” he muttered, “I have found you!” He was again confronted by three closed doors, one leading to a room that faced the street, another opening upon a room in the rear of the house, and opposite, across the hallway, still another door. He observed that the first two doors were each fastened from the outside by bolts and a spring lock, and that the key to each lock was in place. The fact moved him with indecision. If he took possession of the keys, he could enter the rooms at his pleasure. On the other hand, should their loss be discovered, an alarm would be raised and he would inevitably come under suspicion. The very purpose he had in view might be frustrated. He decided that where they were the keys would serve him as well as in his pocket, and turned his attention to the third door. This was not locked, and, from its position, Ford guessed it must be an entrance to a servants' stairway.

Confident of this, he opened it, and found a dark, narrow landing, a flight of steps mounting from the kitchen below, and, to his delight an iron ladder leading to a trap-door. He could hardly forego a cheer. If the trap-door were not locked, he had found a third line of retreat, a means of escape by way of the roof, far superior to any he might attempt by the main staircase and the street-door.

Ford stepped into the landing, closing the door behind him and though this left him in complete darkness, he climbed the ladder, and with eager fingers felt for the fastenings of the trap. He had feared to find a padlock, but, to his infinite relief, his fingers closed upon two bolts. Noiselessly, and smoothly, they drew back from their sockets. Under the pressure of his hand the trap door lifted, and through the opening swept a breath of chill night air.

Ford hooked one leg over a round of the ladder and, with hands frees moved the trap to one side. An instant later he had scrambled to the roof, and, after carefully replacing the trap, rose and looked about him. To his satisfaction, he found that the roof upon which he stood ran level with the roofs adjoining its to as far as Devonshire Street, where they encountered the wall of an apartment house. This was of seven stories. On the fifth story a row of windows, brilliantly lighted, opened upon the roofs over which he planned to make his retreat. Ford chuckled with nervous excitement.

“Before long,” he assured himself, “I will be visiting the man who owns that flat. He will think I am a burglar. He will send for the police. There is no one in the world I shall be so glad to see!”

Ford considered that running over roofs, even when their pitfalls were not concealed by a yellow fog, was an awkward exercise, and decided that before he made his dash for freedom, the part of a careful jockey would be to take a preliminary canter over the course. Accordingly, among party walls of brick, rain-pipes, chimney-pipes, and telephone wires, he felt his way to the wall of the apartment house; and then, with a clearer idea of the obstacles to be avoided, raced back to the point whence he had started.