After we had strolled some distance along the beach, where the grey-green waters were breaking into foam, my friend suddenly halted and, taking a piece of paper from his pocket, stood with his back to the sea and made a sketch of the irregular contour of the blue hills facing him from the coastguard at Salthouse on the right to the rising ground behind Upper Sheringham on the left—the positions which are to be first occupied by the enemy in their attack upon us.
He made no explanation of the reason of his action, therefore I stood by watching in silence.
At last we returned to the car and drove inland to Weybourne village, a sleepy old-world little place from which the sea has receded. As we turned into the main road he ordered the man to pull up, and, descending, looked about him, first at the lines of telegraph-wire running beside the road, and then we both strolled through the village. My companion's eyes were everywhere. He appeared to be making mental notes of every feature of the obscure little place.
Just as we were returning to the car he suddenly halted, saying:
"You go on. A thought has just occurred to me." And, turning, he walked back to the small village post office situated next door to an inn, and was absent for nearly a quarter of an hour.
"As I suspected!" he remarked beneath his breath as he rejoined me. "That inn is kept by a German!"
Then we travelled along to Cley-next-the-Sea, and thence by way of Candlestick Hill and through the wooded country around Holt, back to Sheringham, where we lunched at the "Burlington."
His manner had changed. He had again become serious and thoughtful. A cycling map of the district which he had bought in Cromer that morning he brought out, and as we sat together in the smoking-room he spread it upon the table and began measuring distances with a slip of folded paper.
The car was at the door at four o'clock, and we were in the act of moving off, when by mere chance I looked up at the second floor of the hotel. What I saw caused me to hold my breath.
A face was at one of the windows watching us.