"Thank you, Jack; your aid will be welcome; at least, it was so just now."
"All right, doctor," said Jack. "I may be under your hands some day."
"I'll physic you for nothing," said Mr. Chillingworth. "You saved my life. One good turn deserves another; I'll not forget."
"Thank you," said Jack, as he made a wry face. "I hope you won't have occasion. I'd sooner have a can of grog than any bottle of medicine you can give me; I ain't ungrateful, neither."
"You needn't name it; I am getting my breath again. I suppose we had better leave this place, as soon as we conveniently can."
"Exactly. The sooner the better; we can take it the more leisurely as we go."
The moon was up; there were no clouds now, but there was not a very strong light, because the moon was on the wane. It was one of those nights during which an imperceptible vapour arises, and renders the moon somewhat obscure, or, at least, it robs the earth of her rays; and then there were shadows cast by the moon, yet they grew fainter, and those cast upon the floor of the apartment were less distinct than at first.
There seemed scarce a breath of air stirring; everything was quiet and still; no motion—no sound, save that of the breathing of the two who sat in that mysterious apartment, who gazed alternately round the place, and then in each other's countenances. Suddenly, the silence of the night was disturbed by a very slight, but distinct noise, which struck upon them with peculiar distinctness; it was a gentle tap, tap, at the window, as if some one was doing it with their fingernail.
They gazed on each other, for some moments, in amazement, and then at the window, but they saw nothing; and yet, had there been anything, they must have seen it, but there was not even a shadow.
"Well," said Mr. Chillingworth, after he had listened to the tap, tap, several times, without being able to find out or imagine what it could arise from, "what on earth can it be?"