Arnold never hesitated for a moment. He was only too thankful to be able to reply in the affirmative. He put on his coat and propelled the punt a little further into the rushes.
"I'll do my best," he asserted.
Sabatini said never a word, but his silence seemed somehow eloquent. Arnold sprang onto the bank and turned once around.
"If he is there, I'll bring him," he promised.
Sabatini waved his hand and Arnold sped across the meadow. He found the motor car waiting behind the hedge, and he had scarcely stepped in before they were off. They swung at a great speed along the narrow lanes, through two villages, and finally came to a standstill at the end of a long, narrow street. Arnold alighted and found the boat-builder's yard, with rows of boats for hire, a short distance along the front. He chose one and paddled off, glancing at his watch as he did so. It was barely a quarter of an hour since he had left Sabatini.
The river at this spot was broad, but it narrowed suddenly on rounding a bend about a hundred yards away. The house-boat was in sight now, moored close to a tiny island. Arnold pulled up alongside and paused to reconnoiter. To all appearance, it was a derelict. There were no awnings, no carpets, no baskets of flowers. The outside was grievously in need of paint. It had an entirely uninhabited and desolate appearance. Arnold beached his boat upon the little island and swung himself up onto the deck. There was still no sign of any human occupancy. He descended into the saloon. The furniture there was mildewed and musty. Rain had come in through an open window, and the appearance of the little apartment was depressing in the extreme. Stooping low, he next examined the four sleeping apartments. There was no bedding in any one of them, nor any sign of their having been recently occupied. He passed on into the kitchen, with the same result. It seemed as though his journey had been in vain. He made his way back again on deck, and descended the stairs leading to the fore part of the boat. Here were a couple of servant's rooms, and, though there was no bedding, one of the bunks gave him the idea that some one had been lying there recently. He looked around him and sniffed—there was a distinct smell of tobacco smoke. He stepped lightly back into the passageway. There was nothing to be heard, and no material indication of any one's presence, yet he had the uncomfortable feeling that some one was watching him—some one only a few feet away. He waited for almost a minute. Nothing happened, yet his sense of apprehension grew deeper. For the first time, he associated the idea of danger with his enterprise.
"Is any one about here?" he asked.
There was no reply. He tried another door, which led into a sort of pantry, without result. The last one was fastened on the inside.
"Is Mr. Starling in there?" Arnold demanded.
There was still no reply, yet it was certain now that the end of his search was at hand. Distinctly he could hear the sound of a man breathing.