The Case of the Crying Swallow — Erle Stanley Gardner

The Case of the Crying Swallow: A Novella and Two Other Non-Perry Mason Short Stories.

He announced himself as Mr. Cash.
His calling cars was ten crisp hundred-dollar bills!
"My wife has disappeared," he told Perry Mason. "She's in trouble of some sort. I want you to find her."
Mr. Cash's wife was indeed in trouble of a most serious sort. First her jewelry disappeared. And Perry Mason had to find her before the police could arrest her -- for murder!