He nods at Jack's progress and begins to lay out several things he's brought in his clothing. A small wooden bowl, dried herbs, and a bundle of incests. The brave is given a few soft orders for water and later fire for the incests (that he follows with thinly veiled impatience).
First he mixes up the herbs, adding just tiny amounts of water to it. Another bundle of plants, these are fat aloe leaves. He motions with both hands for Jack to move closer and give him the shoulder. The bandages are unwrapped and discarded. First he cleans the wounds with water and then smears the aloe on before patting a thick layer of the herbs over the wounds. The old man mixed the medicine in front of the stranger so he understood what it was. Not a trick. Good for him. The brave brings new bandages when they're asked for, given to him by his woman. Jack is wrapped back up and then the bundle of incests are burned at one end as they're shaken in front of Jack, smoke dancing. He chants and sings during this, giving a blessing.
When it's all done the brave is told to pour Jack some water. The bowl is passed on to the old man who holds it for Jack as he drinks. He imparts more knowledge on all of them, saying that this stranger will survive, he is past fever and it will be good for him to eat and walk. He smiles at Jack like he was a small child and even pats the pirate's head before slowly standing and shuffling out.