“Perfectly. There is a special train leaving for Dover in an hour’s time, with a further contingent from Scotland Yard. You shall be accompanied by a Military officer and a C.I.D. man, who will hold themselves at your disposal in every way. Is that satisfactory?”

“Quite. One more question before you leave, messieurs. What made you come to me? I am unknown, obscure, in this great London of yours.”

“We sought you out on the express recommendation and wish of a very great man of your own country.”

“ Comment? My old friend the Préfet ⁠—?”

Lord Estair shook his head.