Martyrology of Usuard

[2] The martyrology enjoyed consistent success throughout the Middle Ages, as evidenced by numerous surviving manuscripts.

It is preserved to us in innumerable manuscripts, of which Henri Quentin gives a partial list (Martyrologes historiques, 1908, pp. 675–7).

Usuard provided what was substantially an abridgement of Ado's Martyrology in a form better adapted for practical liturgical use.

In certain points, however, Usuard reverted to a Lyonese recension of Bede's augmented Martyrology, which was attributed to the archdeacon Florus of Lyon.

In 858, he went to Spain with his colleague Odilard monk to collect relics; they returned with those martyrs George, Aurelius and Nathalie, Christians executed in Córdoba, Andalusia on 27 July 852.