[Footnote 169: The Pell Rolls, so called from the pells, or skins, on rolls of which accounts of the royal receipts and expenditure used to be kept, are preserved both in the Chapter House of Westminster, and also in duplicate at the Exchequer Office in Whitehall. The Author had every facility afforded him of examining them at his leisure; and doubtless these documents contain much valuable information, throwing light as well on the national affairs of the times to which they belong, as on the more private history of monarchs and people. This is evident to every one on inspecting the records of any one year. But at the same time they read a lesson, clear and sound, on the indispensable necessity of constant care, and circumspection, and sifting scrutiny, before reliance be placed on them as evidence conclusive, and beyond appeal. The Author of these Memoirs entered upon an examination of the original documents, fully aware that the date of payment with reference to any fact could never be adduced in evidence that the event took place at the time the entry was made, but only that it had taken place before that time. Thus, a debt due to the Prince, or one in command under him, at the siege of a castle in Wales, or to tradesmen and merchants for supplying the forces with provisions, or to messengers sent with all speed bearing despatches to the castle during the siege, might remain unpaid for several years. He was, however, at the same time under an impression that the sum was recorded on the day of payment; at all events, that payments with reference to any insulated fact could not have been recorded as having been made before that fact had transpired. In both these points, however, he was mistaken. Payments were registered not only long after the day on which they were made, but absolutely _before the event had taken place_ to which they refer, and which could not have been anticipated by any human foresight. Thus, not only is payment recorded as having been made to Hotspur nearly five months after his death, and to the Earl of Worcester, twelve weeks after he was beheaded, for expenses