In Lord of the Flies - who chants his address over and over?

The littlun Percival Wemys Madison repeats his name and address a number of times. He has obviously been taught to do this so that, in the event that should he ever become lost, he can be safely returned home. Unfortunately for Percival he is lost in a location from which he can't be returned home. Ironically when rescue finally arrives, in the form of the naval officer, Percival is so traumatised that he can no longer remember any of the information he has been taught to repeat.