The case of the rolling bones

Years ago Alden Leeds found a rich vein of gold in the Klondike. Now his greedy relatives fear he's planning to throw his fortune away on a gold-digging spouse, Emily Milicant. So to prevent the two from joining in holy matrimony, they commit their affluent kin to a sanitarium on a trumped-up charge. Then Leeds escapes, only to end up in the company of Emily's blackmailing brother, John, a manufacturer of fixed Dice, rolling bones that always come up seven. But when John is murdered--with Leeds's fingerprints found all over the apartment--Perry Mason must crack a baffling case before his client bumps from the nuthouse to the jailhouse.