Milburgh! On the journey to Hertford Tarling analysed that urbane man, and found him deficient in certain essential qualities; weighed him and found him wanting in elements which should certainly form part of the equipment of a trustworthy man.

At Hertford he jumped into a cab and gave the address.

"Hillington Grove, sir? That's about two miles out," said the cabman. "It's Mrs. Rider you want?"

Tarling nodded.

"You ain't come with the young lady she was expecting?" said the driver

"No," replied Tarling in surprise.

"I was told to keep my eyes open for a young lady," explained the cabman vaguely.

A further surprise awaited the detective. He expected to discover that Hillington Grove was a small suburban house bearing a grandiose title. He was amazed when the cabman turned through a pair of impressive gates, and drove up a wide drive of some considerable length, turning eventually on to a gravelled space before a large mansion. It was hardly the kind of home he would have expected for the parent of a cashier at Lyne's Store, and his surprise was increased when the door was opened by a footman.

He was ushered into a drawing-room, beautifully and artistically furnished. He began to think that some mistake had been made, and was framing an apology to the mistress of the house, when the door opened and a lady entered.

Her age was nearer forty than thirty, but she was still a beautiful woman and carried herself with the air of a grand dame. She was graciousness itself to the visitor, but Tarling thought he detected a note of anxiety both in her mien and in her voice.