Last Scene of All
After John Calleron was hit he carried on in a kind of twilight of the mind. Things grew dimmer and calmer; harsh outlines of events became blurred; memories came to him; there was a singing in his ears like far-off bells. Things seemed more beautiful than they had a while ago; to him it was for all the world like evening after some quiet sunset, when lawns and shrubs and woods and some old spire look lovely in the late light, and one reflects on past days. Thus he carried on, seeing things dimly. And what is sometimes called "the roar of battle," those aerial voices that snarl and moan and whine and rage at soldiers, had grown dimmer too. It all seemed further away, and littler, as far things are. He still heard the bullets: there is something so violently and intensely sharp in the snap of passing bullets at short ranges that you hear them in deepest thought, and even in dreams. He heard them, tearing by, above all things else. The rest seemed fainter and dimmer, and smaller and further away. He did not think he was very badly hit, but nothing seemed to matter as it did a while ago. Yet he carried on.
This is from "Tales of War" by Lord Dunsany.
I do not understand what "he carried on" means.
Does it mean "he was carried on a strecher"?