“Quite. Since then they have recurred less frequently?”

“Much less frequently.”

“Yes—when did the last occur?”

“About nine months ago.”

“Under what circumstances?”

“I was being worried by certain family matters. It was a question of deciding about some investments, and I was largely responsible.”

“Yes. You were interested last year, I think, in some police case?”

“Yes—in the recovery of Lord Attenbury’s emerald necklace.”

“That involved some severe mental exercise?”

“I suppose so. But I enjoyed it very much.”