She prepared the steed for Oisin and said, "This steed will carry you wherever you wish to go."
Oisin never stopped till the steed touched the soil of Erin; and he went on till he came to Knock Patrick in Munster, where he saw a man herding cows. In the field, where the cows were grazing there was a broad flat stone.
"Will you come here," said Oisin to the herdsman, "and turn over this stone?"
"Indeed, then, I will not," said the herdsman; "for I could not lift it, nor twenty men more like me."
Oisin rode up to the stone, and, reaching down, caught it with his hand and turned it over. Underneath the stone was the great horn of the Fenians (borabu), which circled round like a seashell, and it was the rule that when any of the Fenians of Erin blew the borabu, the others would assemble at once from whatever part of the country they might be in at the time.
"Will you bring this horn to me!" asked Oisin of the herdsman.
"I will not," said the herdsman; "for neither I nor many more like me could raise it from the ground." With that Oisin moved near the horn, and reaching down took it in his hand; but so eager was he to blow it, that he forgot everything, and slipped in reaching till one foot touched the earth. In an instant the steed was gone, and Oisin lay on the ground a blind old man. The herdsman went to Saint Patrick, who lived near by, and told him what had happened.
Saint Patrick sent a man and a horse for Oisin, brought him to his own house, gave him a room by himself, and sent a boy to stay with him to serve and take care of him. And Saint Patrick commanded his cook to send Oisin plenty of meat and drink, to give him bread and beef and butter every day.
Now Oisin lived a while in this way. The cook sent him provisions each day, and Saint Patrick himself asked him all kinds of questions about the old times of the Fenians of Erin. Oisin told him about his father, Fin MacCumhail, about himself, his son Osgar, Goll MacMorna, Conan Maol, Diarmuid, and all the Fenian heroes; how they fought, feasted, and hunted, how they came under Druidic spells, and how they were freed from them.
At the same time, Saint Patrick was putting up a great building; but what his men used to put up in the daytime was levelled at night, and Saint Patrick lamented over his losses in the hearing of Oisin. Then Oisin said in the hearing of Saint Patrick, "If I had my strength and my sight, I'd put a stop to the power that is levelling your work."