‘I cannot imagine,’ said Jack, recovering the chaplain and guiding him along the gangway, ‘what that sloth has against me. I have always been civil to it, more than civil; but nothing answers. I cannot think why you speak of its discrimination.’

Jack was of a sanguine temperament; he liked most people and he was surprised when they did not like him. This readiness to be pleased had been damaged of recent years, but it remained intact as far as horses, dogs, and sloths were concerned; it wounded him to see tears come into thecreature’s eyes when he walked into the cabin, and he laid himself out to be agreeable. As they ran down to Rio he sat with it at odd moments, addressing it in Portuguese, more or less, and feeding it with offerings that it sometimes ate, sometimes allowed to drool slowly from its mouth; but it was not until they were approaching Capricorn, with Rio no great distance on the starboard bow, that he found it respond.

The weather had freshened almost to coldness, for the wind was coming more easterly, from the chilly currents between Tristan and the Cape; the sloth was amazed by the change; it shunned the deck and spent its time below. Jack was in his cabin, pricking the chart with less satisfaction than he could have wished: progress, slow, serious trouble with the mainmast – unaccountable headwinds by night – and sipping a glass of grog; Stephen was in the mizentop, teaching Bonden to write and scanning the sea for his first albatross. The sloth sneezed, and looking up, Jack caught its gaze fixed upon him; its inverted face had an expression of anxiety and concern. ‘Try a piece of this, old cock,’ he said, dipping his cake in the grog and proffering the sop. ‘It might put a little heart into you.’ The sloth sighed, closed its eyes, but gently absorbed the piece, and sighed again.

Some minutes later he felt a touch on his knee: the sloth had silently climbed down and it was standing there, its beady eyes looking up into his face, bright with expectation. More cake, more grog: growing confidence and esteem. After this, as soon as the drum had beat the retreat, the sloth would meet him, hurrying towards the door on its uneven legs: it was given its own bowl, and it would grip it with its claws, lowering its round face into it and pursing its lips to drink (its tongue was too short to lap). Sometimes it went to sleep in this position, bowed over the emptiness.

HMS Surprise – Patrick O’Brian

The sloth was not easily alarmed; as soon as it was provided with a piece of hawser stretched taut in the cabin it went fast to sleep, hanging by its claws and swaying with the roll as it might have done in the wind-rocked branches of its native forest. Indeed, apart from its candid distress at the sight of Jack’s face it was perfectly adapted for a life at sea; it was uncomplaining; it requires no fresh air, no light; it thrive in a damp, confined atmosphere; it could sleep in any circumstances; it was tenacious of life; it put up with any hardship. It accepted biscuit gratefully, and pap; and in the evenings it would hobble on deck, walking on its claws, and creep into the rigging, hanging there upside down and advancing two or three yards at a time, with pauses for sleep. The hands loved it from the first, and would often carry it into the tops or higher; they declared it brought the ship good luck, though it was difficult to see why, since the wind rarely blew east of south, and that but feebly, day after day. 

Yet the fresh provisions had their astonishingly rapid effect; in a week’s time the sick-bay was almost empty, and the Surprise, fully manned and cheerful, had recovered her old form, her high-masted, trim appearance. She returned to her exercising of the great guns, laid aside for the more urgent repairs, and every day the trade-wind carried away great wafts of her powder-smoke: at first this perturbed the sloth; it scuttled, almost ran, below, its claws going clack-clack-clack in the silence between one broadside and the next; but by the time they had passed directly under the sun and the wind came strong and true at last, it slept through the whole exercise, hanging in its usual place in the mizzen catharpins, above the quarterdeck carronades, just as it slept through the Marines’ musketry and Stephen’s pistol-practice. 

HMS Surprise — Patrick O’Brian