You can die laughing (A Morrow mystery)
by Erle Stanley Gardner
Category: Cool, Bertha (Fictitious character)

All's A. A. Fair (alias Erle Stanley Gardner) in the private sanctum of Cool & Lam, until mineral rights, marital fights, and a gossipy neighbor turn out to be more than mere figures of fun to Bertha and Donald. Things got off to a cyclonic start when a Texas tycoon breezed into their office one day and airily began discussing oil and/or minerals . . . The trouble was, he didn't stick to the point. The wells he had in mind was a Mrs. Wells. And the question was: where was she? Bertha Cool, fit to be tied, was inclined to blame the whole muddle on her partner, Donald Lam -- until he ran across the biggest blabbermouth on record, with a vicious bit in her teeth and no curb on her tongue. . .