The speaker in Robin Hood and the Scotchman is the narrator of the story. In this case, it is a third-person narrator. The narrator is not involved in the story. He is just reciting it. Based on a history of the era in which Robin Hood is believed to have lived, it is safe to assume that the narrator was a traveling musician who made a living traveling from royal court to royal court telling stories and singing ballads.
Decompression sickness manifests ITSELF with joint pain and it can be fatal. 'Itself is a word that is usually used as the object of a verb or preposition to refer to to an inanimate thing or an animal which has been mentioned previously as the subject of the sentence.