Bennett had devised a ring-lock which would open, the treasure
vault. No other ring except the one which he had so carefully
hidden was of the size or weight that would move the lever which
would set the machinery working to open the treasure house.

Again Wu tried another of his own rings, and a third time Long Sin
dropped in a ring from his finger. Still there was no result.

"The ring which we lost is the key to the puzzle--the only key,"
exclaimed Wu Fang finally. "We must recover it at all hazard."

To his subtle mind a plan of action seemed to unfold almost
instantly. "There is no good remaining here," he added. "And we
have gained nothing by the capture of the girl, unless we can use
her to recover the ring."

Long Sin followed his master with a sort of intuition. "If we have
to steal it," he suggested deferentially, "it can be accomplished
best by making use of Chong Wah Tong."

The Tong was the criminal band which they had offended, which had
in fact stolen the ring from Long Sin and sold it to Elaine. Yet
in a game such as this enmity could not last when it was mutually
disadvantageous. Wu took the suggestion. He decided instantly to
make peace with his enemies--and use them.

Later that night, in his car, Wu stopped near the little curio
shop kept by the new Tong leader.