After careful examination, I propound the solution that this survey was originally made under Henry I, and was subsequently corrected here and there, to bring the entries up to date, down to the days of Henry II. The late transcriber, to whom we owe the survey in its present form, has incorporated these additions and corrections in a single text with the most bewildering result. We trace exactly the same process in the Red Book of the Exchequer. In the Black Book the later additions that were made to the barons' _cartae_ of 1166 are distinguished by the difference in handwriting. But in the Red Book these interpolations are found transcribed in the same hand as the genuine original returns. To the uninitiated this has been the cause of no small confusion. So, too, in the above list of Peterborough knights (p. 157), the very first entry, made _temp._ Hen. I, has been carried on by a later hand to the time of Henry III. But there Stapleton, who transcribed the list, carefully discriminated between the two.[11] It is probable that the lists of Abingdon knights, published in the Abingdon cartulary, are rendered untrustworthy in places from the same cause of error. The transcriber's ignorance is clearly shown by such a name as 'Comes Mauricius', which is evidently his erroneous extension of an original 'Comes Maur'', _i.e._ Count of Mortain! So also we are enabled to detect proof of the theory I advance in such an entry as 'Willelmus Meschin de feodo Wellelmi de Curcy'; for William de Curcy held, _temp._ Henry II, the barony held by William Meschin (his maternal grandfather, according to Stapleton[12]) _temp._ Henry I. Thus, the original entry will have run 'William Meschin', while a later hand, in his grandson's days, will have added, by way of substitution, 'De feodo William de Curcy'.[13] Our transcriber, combining the two, has, of course, made nonsense of the whole. The same explanation applies to the entry, 'Robertus filius Regis de feodo Glovernie', where the first three words represent the original entry, while the others were added, probably under Henry II, to connect the holding with the fief of [the Earl of] Gloucester. 'Brien filius Comitis de feodo de Wallin[g]ford' is another instance in point, and so, I suspect, is 'Odo [_sic_] dapifer de feodo de Colcestra'; for I take it that the entry was originally made in the lifetime of Eudo Dapifer (d. 1120) and that, as his 'honour' passed into the King's hands, the 'de feodo de Colcestra' was added at a later time.[14]