Her Royal Highness by William Le Queux

Hubert Waldron, after a sleepless night, determined to begin his inquiries independently of the famous Chief of Police, Ghelardi, whom he had not met since that memorable evening in Shepheard's.

It was news to him that the famous European spy had resigned from the service of his masters in Berlin, and returned to the land of his birth. At least, however, there was one consolation, namely, that he would, in his new position, no longer be antagonistic to England.