To turn now to manuscripts, disregarding the other classes of printed books, the cathedral possesses a great treasure in the #Textus Roffensis#, which is said to be the work of Bishop Ernulf and dates from early in the twelfth century. It contains old English codes of law, beginning with Ethelbert's, much ecclesiastical and historical information, records of privileges of the cathedral, and some interesting forms of excommunication, oaths, etc. In 1633 the dean (Dr. Balcanqual) and chapter had to obtain a bill in chancery to enforce its restitution by a Dr. Leonard who had got it into his possession. During the Civil Wars it was in the charge of Sir Roger Twysden and was used by Dugdale for his great work. The book was at London in 1712 for Dr. Harriss, a prebendary of the cathedral, to use for his "History of Kent" (published in 1719). It was taken thither and back by water, and on the return journey fell into the Thames. It was, fortunately, recovered, not much damaged, but was re-bound afterwards. Lambarde, as well as later historians, used it. Parts were printed by Wharton in his "Anglia Sacra" (1691) and by Willems in his "Leges Anglo-Saxonicae" (1721). Hearne edited most of it, from a transcript by Sir Edward Dering, in 1720. The #Custumale Roffense# (per fratrem J. de Westerham), another famous manuscript, dates from about 1300, its author, then a monk, became prior later, in Bishop Hamo's time. In this book is much information about manors and the priory's income from them, and it contains many interesting particulars of ancient tenures and rents, some details about the Rome-scot, notes as to the duties of various servants, etc. A printed edition of it, by Thorpe, appeared in 1788.