"Not a sign, Petrie," he said softly; "yet...." Dropping the glasses back into their case, my companion began to tug at his left ear. "Have we been over-confident?" he said, narrowing his eyes in speculative fashion. "No less than three times I have had the idea that something, or some one, has just dropped out of sight, _behind_ us, as I focussed...." "What do you mean, Smith?" "Are we"--he glanced about him as though the vastness were peopled with listening Chinamen--"_followed_?" Silently we looked into one another's eyes, each seeking for the dread which neither had named. Then: "Come on, Petrie!" said Smith, grasping my arm: and at quick march we were off again. Cragmire Tower stood upon a very slight eminence, and what had looked like a green tongue, from the moorland slopes above, was in fact a creek, flanked by lush land, which here found its way to the sea. The house which we were come to visit consisted in a low, two-storey building, joining the ancient tower on the east, with two smaller out-buildings. There was a miniature kitchen-garden, and a few stunted fruit trees in the north-west corner; the whole being surrounded by a grey stone wall. The shadow of the tower fell sharply across the path, which ran up almost alongside of it. We were both extremely warm by reason of our long and rapid walk on that hot day, and this shade should have been grateful to us. In short, I find it difficult to account for the unwelcome chill which I experienced at the moment that I found myself at the foot of the time-worn monument. I know that we both pulled up sharply and looked at one another as though acted upon by some mutual disturbance. But not a sound broke the stillness save the remote murmuring, until a solitary sea-gull rose in the air and circled directly over the tower, uttering its mournful and unmusical cry. Automatically to my mind sprang the lines of the poem: Far from all brother-men, in the weird of the fen, With God's creatures I bide, 'mid the birds that I ken; Where the winds ever dree, where the hymn of the sea Brings a message of peace from the ocean to me. Not a soul was visible about the premises; there was no sound of human activity and no dog barked. Nayland Smith drew a long breath, glanced back along the way we had come, then went on, following the wall, I beside him, until we came to the gate. It was unfastened, and we walked up the stone path through a wilderness of weeds. Four windows of the house were visible, two on the ground floor and two above. Those on the ground floor were heavily boarded up, those above, though glazed, boasted neither blinds nor curtains. Cragmire Tower showed not the slightest evidence of tenancy. We mounted three steps and stood before a tremendously massive oaken door. An iron bell-pull, ancient and rusty, hung on the right of the door, and Smith, giving me an odd glance, seized the ring and tugged it.