ew in his monoplane.

"I'll turn them over to our Mr. Porter, a gem expert," said the clerk.
"Please be seated."

The young man disappeared into a private office with the stones, and Tom
waited. He wondered if he was going to have his trouble for his pains.
Presently two elderly gentlemen came from the little room, on the glass
door of which appeared the word "Diamonds."

"Who brought these stones in?" asked one of the men, evidently the
proprietor, from the deference paid him by the clerk. The latter
motioned to Tom.

"Will you kindly step inside here?" requested the elderly man. When the
door was closed, Tom found himself in a room which was mostly taken up
with a bench for the display of precious stones, a few chairs, and some
lights arranged peculiarly; while various scales and instruments stood
on a table.

"You wished an opinion on--on these?" queried the proprietor of the
place. Tom noticed at once that the word "diamonds" was not used.

"I wanted to find out if they were of any value," he said. "Are they
diamonds?"

"Would you mind stating where you got them?" asked the other of the two
men.

"Is that necessary?" inquired the lad. "I came by them in a legitimate
manner, if that's what you mean, and I can satisfy you on that point.
I am willing to pay for any information you may give me as to their
value."

"Oh, it isn't that," the proprietor hastened to assure him. "But these
are diamonds of such a peculiar kind, so perfect and without a flaw,
that I wondered from what part of the world they came."

"Then they are diamonds?" asked Tom, eagerly.

"The finest I have ever tested!" declared the other man, evidently Mr.
Porter, the gem expert. "They are a joy to look at, Mr. Roberts," he
went on, turning to the proprietor. "If it is possible to get a supply
of them you would be justified in asking half as much again as we charge
for African or Indian diamonds. The Kimberly products are not to be
compared to these," and he looked at the two stones in his hand--the one
cut, and sparkling brilliantly, the other in a rough state.

"Do you care to state where these diamonds came from?" asked Mr.
Roberts, looking critically at Tom.

"I had rather not," answered the lad. "It is enough for me to know that
they are diamonds. How much is your charge?"

"Nothing," was the unexpected answer. "We are very glad to have had the
opportunity of seeing such stones. Is there any chance of getting any
more?"

"Perha