Which sentence in the excerpt from Robert Louis Stevenson’s Treasure Island contains a metaphor?

Out of the eight men who had fallen in the action, only three still breathed—that one of the pirates who had been shot at the loophole, Hunter, and Captain Smollett; and of these, the first two were as good as dead; the mutineer indeed died under the doctor's knife, and Hunter, do what we could, never recovered consciousness in this world. He lingered all day, breathing loudly like the old buccaneer at home in his apoplectic fit, but the bones of his chest had been crushed by the blow and his skull fractured in falling, and some time in the following night, without sign or sound, he went to his Maker.

As for the captain, his wounds were grievous indeed, but not dangerous. No organ was fatally injured. Anderson's ball—for it was Job that shot him first—had broken his shoulder-blade and touched the lung, not badly; the second had only torn and displaced some muscles in the calf. He was sure to recover, the doctor said, but in the meantime, and for weeks to come, he must not walk nor move his arm, nor so much as speak when he could help it.

My own accidental cut across the knuckles was a flea-bite. Doctor Livesey patched it up with plaster and pulled my ears for me into the bargain.

After dinner the squire and the doctor sat by the captain's side awhile in consultation; and when they had talked to their hearts' content, it being then a little past noon, the doctor took up his hat and pistols, girt on a cutlass, put the chart in his pocket, and with a musket over his shoulder crossed the palisade on the north side and set off briskly through the trees.