on certain lines, I have already had two or three little cases not without interest. There was the Episode of the Housemaid's brooch, and the Adventure of the Black Dog——"

"What was that?" asked the Duke eagerly.

"A mere trifle," said the amateur detective with an airy wave of his hand. "I'd noticed the dog hanging about our kitchen; as we have no dogs I knew it was a stranger, as it stuck to the kitchen, knew it must be hungry. Looked on its collar, discovered it belonged to a Colonel B——, took it back and restored it to its owner, and told him within a day or so, how long it was, since he had lost it."

Hank shook his head in speechless admiration.

"Any time you happen to be passing," said young Mr. Nape rising to go, "call in and see my little laboratory; I've fixed it up in the greenhouse; if you ever want a blood stain analysed I shall be there."

"Sitting in your dressing gown, I suppose," said the Duke with awe, "playing your violin and smoking shag?"

Young Mr. Nape frowned.

"Somebody has been talking about me," he said severely.

III

"63 has to call, 51 is out of town, and 35 has measles in the house," reported the Duke one morning at breakfast.

Hank helped himself to a fried egg with the flat of his knife.

"What about next door!" he asked.

"Next door won't call," said the Duke sadly. "Next door used to live in Portland Place, where dukes are so thick that you have to fix wire netting to prevent them coming in at the window—no, mark off 66 as a non-starter."

Hank ate his egg in silence.

"She's very pretty," he said at length.

"66?"

Hank nodded.

"I saw her yesterday, straight and slim, with a complexion like snow——"

"Cut it out!" said the Duke brutally.

"And eyes as blue as a winter sky in Texas."

"Haw!" murmured his disgusted grace.

"And a walk——" apostrophized the other dreamily.

The Duke raised his hands.

"I surrender, colonel," he pleaded; "you've been patronizing the free library. I recognize the bit about the sky over little old Texas."

"What happened——?" Hank jerked his head in the direction of No. 66.

The Duke was serious when he replied.

"Africans, Siberians, Old Nevada Silver and all the rotten stock that a decent, easy-going white man could be lured into buying," he said quietly; "that was the father. When the smash came he obligingly died."

Hank pursed his lips thoughtfully.

"It's fairly tragic," he said, "poor girl."

The Duke was deep in thought again.

"I must meet her," he said briskly.

Hank looked at the ceiling.

"In a way," he said slowly, "fate has brought you together, and before the day is over, I've no doubt you will have much to discuss in common."

The Duke looked at him with suspicion.

"Have you been taking a few private lessons from young Sherlock Nape?" he asked.

Hank shook his head.