Was it possible that his employer knew his secret—the secret of his visit to Cromwell Road on the previous night? Perhaps he did. The suggestion crossed his mind, and he stood breathless for a few seconds.

“I thought you had left for Servia, Rolfe,” exclaimed the old man in his thin, weak voice. He had seated himself at the writing-table prior to his secretary’s appearance, and had tried to assume a businesslike air. But his face was unusually drawn and haggard.

“I missed the train last night,” was the young man’s reply. “It is useless to leave till to-night, as I can then catch the Orient Express from Paris to-morrow morning. Therefore I thought I’d call to see if you have any further instructions.”

The old man grunted. His keen eyes were fixed upon the other’s face. The explanation was an unsatisfactory one.

Samuel Statham, as became a great financier, had a wonderful knack of knowing all that passed. He had his spies and secret agents in every capital, and was always well informed of every financial move in progress. To him, early information often meant profits of many thousands, and that information was indeed paid for generously.

In London, too, his spies were ever at work. Queer, mysterious persons of both sexes often called there in Park Lane, and were admitted to private audience of the king of the financial world. Rolfe knew them to be his secret agents, and, further, that his employer’s knowledge of his own movements was often wider than he had ever dreamed.

No man in the whole City of London was more shrewd or more cunning than old Sam Statham. It was to the interest of Statham Brothers to be so. Indeed, he had once remarked to his secretary that no secret, however carefully kept, was safe from his agents, and that he could discover without difficulty anything he wanted to know.

Had he discovered the truth regarding the strange disappearance of the Doctor and his daughter?

“Why did you lose the train last night, Rolfe?” asked the great financier. “You did not go to Charing Cross,” he added.

Rolfe held his breath again. Yes, as he had feared, his departure had been watched for.