Before Penny could reply, Mrs. Masterbrook came to the porch.

"You're wanted on the 'phone," she told Mr. Nichols.

"Now what?" asked the detective, frowning. "I hope it's not Inspector Harris again."

He went into the house and was gone several minutes. Penny could hear him arguing with someone on the wire. Finally he returned to the porch.

"Well, I've done it now," he told her gloomily.

"What is wrong, Dad?"

"Oh, it was Inspector Harris again. There's been another robbery."

"Near here?" Penny asked quickly.

"Yes, about twenty miles away at a place called Benton. Unknown persons broke into the home of a wealthy family and made off with money and jewels valued at several thousand dollars."

"Why, that sounds almost like the other robbery case, Dad."

"Inspector Harris thinks that the same gang may have pulled both of them. He's after me to take the case."

"And you told him you would?"

"I finally agreed that I'd drive over to Benton and make an inspection.

But unless the case is a particularly interesting one I'll have nothing of it. This was supposed to have been my vacation."

"Are you going to Benton now?" questioned Penny eagerly.

"Yes, I'll be back in a few hours."

"Take me with you, Dad," Penny pleaded.

"All right," the detective agreed, "but I don't care to be influenced by any of your wild theories as to who committed the robbery."

"I'll be as quiet as a mouse," Penny promised.

During the ride to Benton Mr. Nichols told her what little he had learned about the case.

"It was the James Kirmenbach home which was robbed," he revealed. "You may have heard of the man. He formerly was the head of the Kirmenbach Chemical Company but retired a few years ago to live quietly in the country. The thieves broke into a wall safe, taking a box of money and jewels. The most valuable item was a diamond necklace."

"I suppose the local police made a routine investigation?"

"Yes, but they found no clues. Kirmenbach appealed to Inspector Harris and that's how I'm rung in on the deal."

It was a few minutes after nine o'clock when Mr. Nichols drew up in front of an imposing brick house at the outskirts of Benton.

Penny and her father presented themselves at the door and upon giving their names to the maid were promptly admitted. Mr. Kirmenbach, a bald headed man in his early sixties, came to greet the detective.

"Mr. Nichols?" he asked, extending his hand. "Inspector Harris telephoned that you would take the case."

"I only promised to make an inspection," the detective replied. "Tell me exactly what happened please."

"I'll call my wife," said Mr. Kirmenbach. "She'll be able to give you a better account than I."

While Penny and her father were waiting they glanced quickly about the living room. It was lavishly furnished and in excellent taste.

Mrs. Kirmenbach, a gray haired lady, only a few years younger than her husband, smiled graciously as she bowed to Penny and the detective.

"I do hope that you'll be able to recover my necklace for me," she said to Mr. Nichols. "The other things do not matter, but the diamonds were left me by my father years ago. I prized them for sentimental reasons as well as their actual value."

"When did you discover your loss?" questioned the detective.

"Early this morning Ellen, our maid, noticed that the window of the study had been pried open. She called me at once. The wall safe had been forced and my box of jewels was missing. My husband sent for the police at once."

"And they learned nothing," Mr. Kirmenbach said in a tone of disgust.

"There were no finger-marks, no evidence of any kind."

"How many servants do you employ?" asked the detective.

"Only three," answered Mrs. Kirmenbach. "Ellen is the maid, and we have a colored woman who does the cooking. Jerry, a young college boy, serves as our chauffeur. I can vouch for them all."

"I'll talk with them later," Mr. Nichols said. "I'd like to look at the study now, please."

"This way," invited Mr. Kirmenbach. "I had the room locked up again after the police were here this morning. Nothing has been disturbed."

"Good," said Mr. Nichols. "I'll just look around for a few minutes."

"We'll leave you alone," Mrs. Kirmenbach declared politely. "If you want us for anything, we'll be in the living room."

"It will not take me long," replied the detective.

Penny glanced about the study with keen interest. It was a small paneled room, lined high with book shelves. There was a comfortable davenport, several chairs and a table.

Mr. Nichols first turned his attention to the wall safe. Next he carefully examined the window sill.

"Find anything, Dad?" asked Penny.

"Not yet," he answered.

As her father continued his inspection, Penny became a trifle bored.

She sat down on the davenport and began idly to play with a toy lantern which had been dropped there. It was a child's toy such as one often saw in candy stores filled with sweets. The red isingla.s.s had been broken in one place and the original string wick had been replaced by a tiny bit of cloth.

"Dad," said Penny presently, "do the Kirmenbachs have any children?"

"They didn't mention any," Mr. Nichols replied absently.

"They probably have grandchildren," Penny went on.