The Boyhood of Fionn by James Stephens

But Fionn was gone. He was away, bound with his band of poets for the Galtees.

It is likely they were junior poets come to the end of a year's training, and returning to their own province to see again the people at home, and to be wondered at and exclaimed at as they exhibited bits of the knowledge which they had brought from the great schools. They would know tags of rhyme and tricks about learning which Fionn would hear of; and now and again, as they rested in a glade or by the brink of a river, they might try their lessons over. They might even refer to the ogham wands on which the first words of their tasks and the opening lines of poems were cut; and it is likely that, being new to these things, they would talk of them to a youngster, and, thinking that his wits could be no better than their own, they might have explained to him how ogham was written. But it is far more likely that his women guardians had already started him at those lessons.