HKB
[Differences between book and writ.]
Now these formal differences correspond more or less exactly to a substantial difference. As every modern lawyer knows, a written document may stand in one of two relations to a legal transaction. On the one hand it may itself be the transaction: that is to say, the act of signing, or of signing and delivering, the document may be the act by which certain rights are created or transferred. On the other hand, the instrument may be but evidence of the transaction. Perhaps the law may say that of such a transaction it will receive no evidence save a document written and signed; perhaps it may say that the testimony of documents is not to be contradicted by word of mouth; but still the document is only evidence, though it may be incontrovertible evidence, of the transaction; the transaction may have been complete before the document was signed[943]. This material distinction is likely to express itself in points of form; for instance, such a phrase as 'I hereby give' is natural in the one case; such a phrase as 'Know all men by this writing that I have given' is appropriate in the other. Instruments of both kinds were well enough known in the Frankish kingdom; their history has been traced back into the history of Roman conveyancing[944]. It would be out of place were we here to discuss the question whether the Anglo-Saxon land-book was a dispositive or merely an evidential document; suffice it to say that with rare exceptions the instruments that are of earlier date than the Confessor's reign are in form charters and not writs. On the other hand, the documents of the Angevin kings which treat of gifts of lands and liberties, though we call them charters, are in form (if we adopt the classification here made) not charters but writs. In form they are evidential rather than dispositive; they are addressed to certain persons--all the king's lieges or a class of the lieges--bidding them take notice that the king has done something, has given lands, and then adding some command or some threat. This command or threat makes them more than evidential documents; the Sciatis me dedisse is followed by a Quare volo et firmiter praecipio; it is not for no purpose that the king informs his officers or his subjects of his having made a gift; still in form they are letters, open letters, 'letters patent,' and the points of difference between the Angevin charter and the Angevin 'letters patent' (strictly and properly so called) are few, technical and unimportant when compared with the points of difference which mark off these two classes of documents from the ancient land-book[945]. In short before the end of the twelfth century, the writ-form or letter-form with its salutation, its 'Know ye,' its air of conveying information coupled with commands, has entirely supplanted the true charter-form with its dispositive words and its air of not merely witnessing, but actually being, a gift of land.
[Anglo-Saxon writs.]