The Azteck Opal w/Direct link technology (A Classic Thriller)

"Mr. Mitchel," began Mr. Barnes, the detective, after exchanging greetings, "I have called to see you upon a subject which I am sure will enlist your keenest interest, for several reasons. It relates to a magnificent jewel; it concerns your intimate friends; and it is a problem requiring the most analytical qualities of the mind in its solution."