"Why, what on earth has he——"
"I am a private gentleman," said Musgrave, "as well as the custodian of a great inheritance. And my son did something so horrible that he has ceased to be—I will not say a gentleman—but even a human being. It is the worst crime in the world. Do you remember what Douglas said when Marmion, his guest, offered to shake hands with him?"
"Yes," said Father Brown.
"'My castles are my king's alone, from turret to foundation stone,'" said Musgrave. "'The hand of Douglas is his own.'"
He turned towards the other room and showed his rather dazed visitors back into it.
"I hope you will take some refreshment," he said, in the same equable fashion. "If you have any doubt about your movements, I should be delighted to offer you the hospitality of the castle for the night."
"Thank you, Sir John," said the priest in a dull voice, "but I think we had better go."
"I will have the bridge lowered at once," said their host; and in a few moments the creaking of that huge and absurdly antiquated apparatus filled the castle like the grinding of a mill. Rusty as it was, however, it worked successfully this time, and they found themselves standing once more on the grassy bank beyond the moat.
Granby was suddenly shaken by a shudder.
"What in hell was it that his son did?" he cried.