An important light is thrown on the nature of the jurisdiction exercised by the English admiral by the memorandum of 12 Edward III., in the same roll, the documents in which were collected together at the time it was written, in connection with the consultation of the judges to which it refers.[81] It recites that, among a number of other things, the King’s Justiciaries were to be consulted as to the appropriate method of revising and continuing the form of proceedings instituted and ordained by Edward I. and his Council for maintaining and preserving the ancient supremacy of the crown in the sea of England and the right of the admiral’s office over it, with the view of correcting, interpreting, declaring, and upholding the laws and statutes made formerly by his ancestors, the kings of England, for the maintenance of peace and justice among the people of all nations whatsoever passing through the sea of England, and to take cognisance of all attempts to the contrary in the same, and to punish delinquents and afford redress to the injured; which laws and statutes, the memorandum states, were by Richard I., on his return from the Holy Land, corrected, interpreted, and declared, and were published in the Island of Oleron and named in the French language _La Loy Oleroun_.[82] This memorandum furnishes an important clue as to the nature of the jurisdiction exercised in the so-called sea of England. It is evident from the concluding part that the laws and statutes referred to are the mercantile marine laws, which were best known in this country as the Laws of Oleron, and are included in the _Black Book of the Admiralty_ together with other articles peculiar to the English Admiralty.[83] They appear to have been published by Richard I. at the end of the twelfth century, at a time when the old customs of the sea began to be committed to writing, as rules proper to be observed by the admirals of his fleet for the punishment of delinquencies and the redress of wrongs committed on the sea. They were continued among the Admiralty regulations in subsequent reigns, and it was part of the duties of the admiral to see that they were duly observed in the seas within his jurisdiction. The powers of the admiral were extensive, as may be seen from the memorandum of the fourteenth century defining his office and duties, which has been published by Nicolas,[84] by those given by Twiss in the _Black Book_,[85] and later by Godolphin.[86]