I threw the hammer from me in a fit of temper; it struck upon a large square in the cement floor which gave forth a hollow sound. I was on my knees in an instant, my fingers searching the cracks, and drawing down close I could feel a current of air, slight but unmistakable, against my face.
The cement square, though exactly like the others in the cellar floor, was evidently only a wooden imitation, covering an opening beneath.
The block was fitted into its place with a nicety that certified to the skill of the hand that had adjusted it. I broke a blade of my pocket-knife trying to pry it up, but in a moment I succeeded, and found it to be in reality a trap-door, hinged to the substantial part of the floor.
A current of cool fresh air, the same that had surprised me in the night, struck my face as I lay flat and peered into the opening. The lower passage was as black as pitch, and I lighted a lantern I had brought with me, found that wooden steps gave safe conduct below and went down.
I stood erect in the passage and had several inches to spare. It extended both ways, running back under the foundations of the house. This lower passage cut squarely under the park before the house and toward the school wall. No wonder my grandfather had brought foreign laborers who could speak no English to work on his house! There was something delightful in the largeness of his scheme, and I hurried through the tunnel with a hundred questions tormenting my brain.
The air grew steadily fresher, until, after I had gone about two hundred yards, I reached a point where the wind seemed to beat down on me from above. I put up my hands and found two openings about two yards apart, through which the air sucked steadily. I moved out of the current with a chuckle in my throat and a grin on my face. I had passed under the gate in the school-wall, and I knew now why the piers that held it had been built so high,—they were hollow and were the means of sending fresh air into the tunnel.
I had traversed about twenty yards more when I felt a slight vibration accompanied by a muffled roar, and almost immediately came to a short wooden stair that marked the end of the passage. I had no means of judging directions, but I assumed I was somewhere near the chapel in the school-grounds.
I climbed the steps, noting still the vibration, and found a door that yielded readily to pressure. In a moment I stood blinking, lantern in hand, in a well-lighted, floored room. Overhead the tumult and thunder of an organ explained the tremor and roar I had heard below. I was in the crypt of St. Agatha’s chapel. The inside of the door by which I had entered was a part of the wainscoting of the room, and the opening was wholly covered with a map of the Holy Land.
In my absorption I had lost the sense of time, and I was amazed to find that it was five o’clock, but I resolved to go into the chapel before going home.
The way up was clear enough, and I was soon in the vestibule. I opened the door, expecting to find a service in progress; but the little church was empty save where, at the right of the chancel, an organist was filling the church with the notes of a triumphant march. Cap in hand I stole forward and sank down in one of the pews.