From the entries on the 20th April and the 17th November it is plain that the Cologne MS. of this martyrology edited by Rosweyde comes from Stablo, and it may have been that at Stablo the names of some Frankish saints were inserted into it. Ado went much further than Bede in admitting names from the Old Testament. Roseweyde’s conjecture that this calendar, the so-called “Little Ado,” is the Roman martyrology mentioned by Gregory I. in his letter to Eulogius, is devoid of proof and obviously mistaken, for in that document there were no Old Testament names. This “Little Ado” is not a martyrology at all, but a calendar, and displays none of the peculiarities which characterise the calendars of the city of Rome of that date; neither is it an independent work, but only an abstract made by Ado from his own larger work, and a summary of its contents. The preface prefixed to the two other parts is chiefly concerned with the martyrology, and not with this abstract, and it is only the circumstance that this abstract is found in MSS., with some later additions and altogether separate from the larger work, which led the first editor to regard it as a treatise by itself; it is merely the abstract used at Stablo and Malmedy, and not an original Roman work, though it is plain from Ado’s preface that the existing Roman calendar was employed in its composition.[824] Two or three decades later, Usuardus composed his martyrology after Ado’s example, which he dedicated to Charles the Bald in 875. Usuardus was a monk of St Germain des Près, then outside the gates of Paris, but now surrounded by the city; his work is by no means so full as Ado’s, but is more polished in style, and more uniform in its treatment of the different entries, and on this account is more suited for use in choir. It was accordingly used throughout the entire West, and in all Benedictine monasteries,[825] and even in Rome itself with the exception of the Vatican basilica. At the end of the fifteenth century it was so to speak, the universal martyrology of the Western Church, and indeed no other was known.[826] The value of these works depends naturally upon the sources employed by the redactor, and also upon his personal qualities, as, for instance, whether he revelled in the miraculous or was inclined to be critical. Two martyrologies by German authors must now be dealt with—those of Rabanus Maurus and Notker Balbulus.