He pushed the door open with difficulty. They found themselves in a gloomy chamber, with vaulted roof and stone floor. A faint streak of daylight from an opening somewhere in the roof, partially lit the place. Here, too, the walls were damp and the odour appalling. There were some fragments of broken barrels at one end, and an oak table in the middle of the floor. Jeanne looked round and shivered.
"Let us go on to the end," she said.
Cecil nodded, and they made their way on down the passage.
"The roof is getting lower now," he said. "You had better stoop a little."
She stopped short.
"What is that?" she asked fearfully.
A sound like rolling thunder, faint at first, but growing more distinct at every step, broke the chill silence of the place.
"The sea," Cecil answered. "We are getting near to the beach."
Jeanne nodded and crept on. Louder and louder the sound seemed to become, until at last she paused, half terrified.
"Where are we?" she gasped. "It sounds as though the sea were right over our heads."