With a vicious scowl Mark sprang upon her, and clapped a hand over her mouth. Then, as she still continued to produce muffled sounds of distress, he stuffed his handkerchief in between her teeth and, lifting her bodily in his arms, thrust her before him into the clock, and pushed her roughly down the hidden stair. Half-way down she lost her footing, and fell to the bottom, where Julia was standing with her little lamp in her hand.
Mark was following close behind, and between them they picked her up and hurried her, limping and bruised, along the narrow passage. She was allowed to take the handkerchief out of her mouth, for no cry could penetrate the immense thickness of these blocks of stone. At the point where there was a break to right and left in the walls of the passage, Julia came to a standstill.
"Here it is," she said, turning her light on to the opening in the wall on the left-hand side. "The door is gone, so you will have to fetch something to block it up with."
It seemed to be a small, cell-like chamber, built into the side of the tower. It may have contained a dozen cubic yards of space, and had neither door nor window.
"There are some slabs of stone at the end of the passage," said Julia. "They are heavy, but you are strong, you will be able to bring them. We must leave a little space at the top of the door to admit some air, and for me to pass food through to our prisoner." She laughed with a feverish merriment. "It will be like feeding the animals at the Zoo," she said.
Mark signified his approval by a nod.
"And is this the way?" he asked, turning round and starting off in the opposite direction.
"No, no!" Julie cried, laying a detaining hand upon his arm. "I don't know what there is down there. I think it is a well. See, you are on the very edge."
She cast the light on to a round dark opening in the ground some six feet in front of and below them. From where they stood the floor began to slant suddenly and steeply downward, so that if Mark had taken another step, it looked as if nothing could have prevented his sliding down into the gaping circle of blackness at the bottom.
Julia shuddered violently.
"Oh," she cried, "if you had gone over! Come away, do come away!"