‘True enough that, Miss Jennings. The creak of a door will be a murdered man’s groan sometimes. I remember once being at a country house and holding a pistol in my hand ready to cover the figure of a man that was watching the old-fashioned building with burglarious intentness; which same man, after I had stood staring at him her a long twenty minutes, was resolved by the crawl of the moonshine into the original fabric and proportions of a neatly-clipped bush. No; I shall not suffer that mysterious voice to sink very deep. It was passing strange and that’s all. I hope sour old Crimp has some sense of the ridiculous and will keep his mouth shut. Heaven deliver us if he should take it upon himself to tell Wilfrid a mysterious sea-voice sung out just now that this yacht was cursed!’

I rose with a glance at the skylight. ‘Excuse me for a few minutes. I am going to Wilfrid’s cabin to confirm a suspicion that has entered my head. Should my cousin arrive whilst I am absent, endeavour to detain him here until I return. I shall know how to excuse myself for entering his bed-room.’

She looked at me wonderingly, but asked no questions. I walked swiftly but softly to the corridor aft. Wilfrid’s cabin was on the port side. It was the aftermost berth, two cabins there having been knocked into one. I turned the handle of the door and entered. The flame of a silver-bright bracket lamp filled the place with light. It was a very handsome sea apartment, with no lack of mirrors, hangings, small costly furniture, all designed for the comfort and happiness of her ladyship. I nimbly closed the door behind me and stood for an instant beholding the precise spectacle I had entered fully expecting to witness. It was Muffin, who stood close against the bulkhead at the foot of the bunk my cousin occupied, grasping in his left hand a small white jar such as might be used for jam, whilst in the other hand he flourished a brush, with which he was apparently painting or scoring marks upon the bulkhead as I entered. The occasional kick of the rudder, with frequent creaking, straining noises arising from the movement of the yacht, hindered him from hearing me turn the handle of the door and from being conscious of my presence, whilst I stood looking on. He had made some progress with his mysterious lettering; for, having dipped the brush into the jar, he fell to writing a big B after several preliminary flourishes of his arm as though he had a mind to give an artistic curve to the letter; he was then beginning to paint a small A, though the brush left no mark, when I exclaimed, ‘How many b’s are there in baby?’

He looked round slowly, keeping his right hand nevertheless lifted, and preserving his posture in all save the turn of his head as though he had been blasted into motionlessness by a flash of lightning. I walked up to him:

‘So,’ said I, ‘you are the warning, eh? You are the mysterious fiery message which has distracted my cousin for the last two days and nights, and which, if continued, must end in driving him mad? You scoundrel!’

He faced round, his right hand slowly sinking to his side like a pump-handle gradually settling. For a moment there was a look of malevolent defiance in his face, but it yielded to one of consternation, terror, eager entreaty.

‘Mr. Monson, sir,’ he exclaimed in a voice that was the very double-distilled extract of oily accent, ‘I am discovered, sir. I meant the honourable bayronet no ’arm. My ’umble wish is to get ’ome.’

‘What is that stuff you have there?’

‘A remedy for wermin, sir, which they told me was numerous on board ship.’

‘Open that porthole!’