The youngest of three brothers crosses into the other world and sees extraordinary things which are later explained. [NB As well as the standard type, versions of the following by-forms are included here: (a) A monk spends three hundred years listening to the song of a heavenly bird, thinking that the time has been only a few hours; (b) A man, who refuses to attend Mass because he has quarreled with the priest, is shown his error (water flowing through the carcase of a dog is pure and sweet).]