A violent perspiration, and a lowness of spirits, always came over the Captain as this gloomy picture presented itself to his imagination. It generally did so previous to his stealing out of doors at night for air and exercise. Sensible of the risk he ran, the Captain took leave of Rob, at those times, with the solemnity which became a man who might never return: exhorting him, in the event of his (the Captain's) being lost sight of, for a time, to tread in the paths of virtue, and keep the brazen instruments well polished.

But not to throw away a chance; and to secure to himself a means, in case of the worst, of holding communication with the external world; Captain Cuttle soon conceived the happy idea of teaching Rob the Grinder some secret signal, by which that adherent might make his presence and fidelity known to his commander, in the hour of adversity. After much cogitation, the Captain decided in favour of instructing him to whistle the marine melody, 'Oh cheerily, cheerily!' and Rob the Grinder attaining a point as near perfection in that accomplishment as a landsman could hope to reach, the Captain impressed these mysterious instructions on his mind:

'Now, my lad, stand by! If ever I'm took - '

'Took, Captain!' interposed Rob, with his round eyes wide open.

'Ah!' said Captain Cuttle darkly, 'if ever I goes away, meaning to come back to supper, and don't come within hail again, twenty-four hours arter my loss, go you to Brig Place and whistle that 'ere tune near my old moorings - not as if you was a meaning of it, you understand, but as if you'd drifted there, promiscuous. If I answer in that tune, you sheer off, my lad, and come back four-and-twenty hours arterwards; if I answer in another tune, do you stand off and on, and wait till I throw out further signals. Do you understand them orders, now?'

'What am I to stand off and on of, Captain?' inquired Rob. 'The horse-road?'

'Here's a smart lad for you!' cried the Captain eyeing him sternly, 'as don't know his own native alphabet! Go away a bit and come back again alternate - d'ye understand that?'

'Yes, Captain,' said Rob.

'Very good my lad, then,' said the Captain, relenting. 'Do it!'

That he might do it the better, Captain Cuttle sometimes condescended, of an evening after the shop was shut, to rehearse this scene: retiring into the parlour for the purpose, as into the lodgings of a supposititious MacStinger, and carefully observing the behaviour of his ally, from the hole of espial he had cut in the wall. Rob the Grinder discharged himself of his duty with so much exactness and judgment, when thus put to the proof, that the Captain presented him, at divers times, with seven sixpences, in token of satisfaction; and gradually felt stealing over his spirit the resignation of a man who had made provision for the worst, and taken every reasonable precaution against an unrelenting fate.

Nevertheless, the Captain did not tempt ill-fortune, by being a whit more venturesome than before.