As they were nearing London, Caldegard spoke.
"Bellamy," he said, "that brother of yours won't stop at killing if——"
"He'll begin with it," replied Randal, "if he gets a fair chance."
"It gives me unreasonable hope," said Caldegard.
"Men who've trusted Dick would call your hope reasonable."
"Yet he's sent us after Ambrotox," complained the father, "and my heart's breaking for my little girl."
"His argument convinced you, anyhow," said Randal.
At New Scotland Yard Sir Randal's card gained them instant admission to the presence of the Superintendent of the Criminal Investigation Department.
He listened without a word to Randal's compact and lucid statement of the facts.
"It's a good thing I was kept here so late to-night, gentlemen," he said. "We shall act without losing a moment in the matter of your daughter's disappearance, Dr. Caldegard. But the theft of your secret, of which both Sir Charles Colombe and the Home Secretary have spoken to me, is a matter of such tremendous importance, that I am obliged to communicate immediately with both these gentlemen and the Commissioner. And you will be doing me a great kindness if you will both remain here until I hear from them."