Cæsar speaks of the numbers who frequented the schools of the druids in Gaul; "it is said," he adds, "that they learn there a great number of verses, and that is why some of those pupils spend twenty years in learning. It is not, according to the druids, permissible to entrust verses to writing although they use the Greek alphabet in all other affairs public and private." Of this prohibition to commit their verses to paper, we have no trace, so far as I know, in our literature, but the accounts of the early bardic schools entirely bear out the description here given of them by Cæsar, and again shows the solidarity of custom which seems to have existed between the various Celtic tribes. According to our early manuscripts it took from nine to twelve years for a student to take the highest degree at the bardic schools, and in many cases where the pupil failed to master sufficiently the subjects of the year, he had probably to spend two over it, so that it is quite possible that some might spend twenty years over their learning. And much of this learning was, as Cæsar notes, in verse. Many earlier law tracts appear to have been so, and even many of the earliest romances. There is a very interesting account extant called the "Proceedings of the Great Bardic Association," which leads up to the Epic of the Táin Bo Chuailgne, the greatest of the Irish romances, according to which this great tale was at one time lost, and the great Bardic Institution was commanded to hunt for and recover it. The fact of it being said that the perfect tale was lost for ever "and that only a fragmentary and broken form of it would go down to posterity" perhaps indicates, as has been pointed out by Sullivan, "that the filling up the gaps in the poem by prose narrative is meant." In point of fact the tale, as we have it now, consists half of verse and half of prose. Nor is this peculiar to the Táin. Most of the oldest and many of the modern tales are composed in this way. In most cases the verse is of a more archaic character and more difficult than the prose. In very many an expanded prose narrative of several pages is followed by a more condensed poem saying the same thing. So much did the Irish at last come to look upon it as a matter of course that every romance should be interspersed with poetry, that even writers of the seventeenth and eighteenth centuries who consciously invented their stories as a modern novelist invents his, have interspersed their pieces with passages, in verse, as did Comyn in his Turlough mac Stairn, as did the author of the Son of Ill-counsel, the author of the Parliament of Clan Lopus, the author of the Women's Parliament, and others. We may take it, then, that in the earliest days the romances were composed in verse and learned by heart by the students--possibly before any alphabet was known at all; afterwards when lacunæ occurred through defective memory on the part of the reciter he filled up the gaps with prose.