Murder in the Gunroom by H. Beam Piper

Humphrey Goode was sixty-ish, short and chunky, with a fringe of white hair around a bald crown. His brow was corrugated with wrinkles, and he peered suspiciously at Rand through a pair of thick-lensed, black-ribboned glasses. His wide mouth curved downward at the corners in an expression that was probably intended to be stern and succeeded only in being pompous. His office was dark, and smelled of dusty books.

"Mr. Rand," he began accusingly, "when your secretary called to make this appointment, she informed me that you had been retained by Mrs. Gladys Fleming."