"This is pretty short notice. How long have you been on this other case?"

"A trifle over six months, sir."

"Don't you want a couple of days to rest up? I can let you have that very easily."

"It really makes no difference—I think I'll leave to-day, sir."

"Oh, a moment more, Inspector—"

Frawley halted.

"How long do you think this ought to take you?"

Frawley considered, and answered carefully:

"It'll be long, I think. You see, there are several circumstances that are unusual about this case."

"How so?"