“Well, ordinary persons, I mean. Then Mr. Penfield, instead of simply stating the fact and returning the letter, becomes mysterious and alarming. He informs me that the envelope was addressed in Dan’s handwriting, that the letter was posted at Penzance at eight-thirty p.m., that it was opened by him in person, and that the contents, which have been seen by no one but himself, are at present reposing in his private safe, of which he alone has the key. What he does not tell us is what the contents of the envelope were; which is the only thing that matters. It is most extraordinary. From the tone of his letter one would think that the envelope had contained something dreadful and incriminating.”

“Perhaps it did,” said Varney. “Dan’s political views are distinctly revolutionary and he is as secret as a whole barrel of oysters. That letter may have contained particulars of some sort of Guy Fawkes conspiracy enclosing samples of suitable explosives. Who knows?”

Margaret was about to reply, when her glance happened to light on Jack Rodney, and something in that gentleman’s expressive and handsome face gave her pause. Had she been chattering indiscreetly? And might Mr. Penfield have meant something after all? There were some curious points about his letter. She smilingly accepted the Guy Fawkes theory and then adroitly changed the subject.

“Speaking of Penzance, Mr. Varney, reminds me that you haven’t told us what sort of voyage you had. There was quite a thick fog, wasn’t there?”

“Yes. It delayed us a lot. Purcell would steer right out to sea for fear of going ashore. Then the breeze failed for a time and then it veered round easterly and headed us, and, as a wind-up to the chapter of accidents, the jib-halyard carried away and we had to reeve a new one. Nice, crazy gear you keep on your craft, Rodney.”

“I suspected that rope,” said Rodney; “in fact I had meant to fit a new halyard before I went up to town. But I should have liked to see Purcell shinning up aloft.”

“So should I—from the shore,” said Varney. “He’d have carried away the mast, or capsized the yacht. No, my friend, I left him below as a counterpoise and went aloft myself.”

“Did Dan go straight off to the station?” Margaret asked.

“I should say not,” replied Varney. “He was in a mighty hurry to be off; said he had some things to see to—I fancy one of them was a grilled steak and a bottle of Bass. We were both pretty ravenous.”

“But why didn’t you go with him, if you were ravenous, too?”