The De Institutione Arithmetica, De Institutione Musica, and the doubtful Geometria (for which see G.
The De Institutione Coenobiorum (twelve books) describes the dress, the food, the devotional exercises, the discipline and the special spiritual dangers of monastic life in the East (gluttony, unchastity, avarice, anger, gloom, apathy, vanity and pride).
Of Champagne and Navarre, are also named among those who urged him to the composition of his "little works," especially the De Institutione Principum.
The Liber de Institutione Principum, a treatise on the duties of kings and their functionaries, has never yet been printed, and the only MS. copy the writer of this article has been able to consult does not contain in its prologue all the information which Echard seems to imply is to be found there.
Of his other works the most interesting is the treatise De rege et regis institutione (Toledo, 1598).
The fragments of a work De Natali Institutione, dealing with astronomy, geometry, music and versification, and usually printed with the De Die Natali of Censorinus, are not by him.
814) to the monastery at Centula (St Riguier) and in the de clericorum institutione of Hrabanus Maurus (c. 820).