“I envy your spirits, Fortune,” Lomas sighed. “You have no sister—no maiden sister.”

And the desultory conversation turned feebly to something else. In fact, both men were feeling the strain of that tangled and squalid crime, the Pimlico murder. They had at last contrived to hang (you remember it) the reluctant borough councillor; but only Reggie Fortune could take a holiday. As he was going, he said that he thought of motoring in Devonshire.

“You’d better call on my sister and investigate her case.” Lomas smiled sourly. “If it is a case. Sometimes I think it’s a dream.”

“Ragging in Girls’ Schools. By our Special Commission. ’Orrible Revelations.”

Lomas shook his head. “I’m afraid my sister won’t take to you. She’s not flippant.”

“Lomas, don’t be improper. A flippant headmistress. I blush.”

A few days later Reggie Fortune drove into Tormouth, liked it, liked its hotel, and called on the Hon. Evelyn Lomas. Miss Lomas was her brother’s sister in face and shape, correctly handsome, slight, dapper, not the least like her brother in manner. She was frankly middle-aged, brisk and direct.

“So glad you could spare time, Mr. Fortune.” She sat down to her writing-table. “My brother tells me I can have every confidence in your discretion.”

“So good of him,” Reggie murmured. He was annoyed with Lomas. He had meant only to make friends with the good lady. It appeared that he was to be an official investigator of the silly girls’ school mystery. An embarrassing position. And Miss Lomas was visibly without humour.

“You will understand that discretion is essential in this case, Mr. Fortune. Anything in the nature of publicity would be unpardonable. You look very young.”