The limits of the British seas, and the sovereignty pertaining to them, were more fully described by Dr Dee some years later in a long unpublished letter or treatise addressed to Sir Edward Dyer,[187] who had apparently asked him for a fuller statement of his views on the subject. In his book Dee said little about the boundaries in the Channel, where the principle of the mid-line was complicated by two circumstances--the claim of Elizabeth to the French crown, and the possession by England of the Channel Islands. In his later treatise he says that presupposing “for doctrine’s sake” that Calais was in the hands of Spain, and the northern coasts of Picardy and Normandy were appropriated by France (which was the case), then the boundary must be drawn in the very middle of the Channel between Dover and Calais, and then westwards in the middle line between the opposite coasts of England and of Picardy and Normandy, until it touched the middle of a straight line drawn between Portland and the island of Alderney. In this region, west of the line, inasmuch as the coasts of the Channel Islands and the opposite coast of England belonged to the Queen, her Majesty had “absolute, peculiar, and appropriate Sea Sovereignty and Jurisdiction Royall.” The western boundary of this area of absolute sovereignty in the narrow seas coincided with a line drawn from Start Point to an “island” that Dee calls “Rocktow,” which is unrepresented on charts, but which is probably a phonetic synonym for “Roches Douvres,” a group of islets off the north coast of Brittany.[188] From the middle of this line the boundary passed westwards, again midway between the coasts of England and Brittany, until it touched the middle of a third straight line drawn from the north-west part of Ushant to about the Lizard. These were the limits on the supposition above referred to; but, “speaking more boldly in her Majesty’s right,” Dee declared that the whole sea between the south coast of England and the north coast of France--Picardy, Normandy, and Brittany--was under the Queen’s “sea-jurisdiction and sovereignty absolute,” inasmuch as she was a real monarch of France by direct inheritance and prior conquest, and therefore had right to the French coasts; and this “absolute sovereignty” served to “enlarge and warrant” the Queen’s “Jurisdiction Respective” in the ocean to the west of France. So also the jurisdiction of the crown of England extended into the main ocean to the west of England and Ireland by reason of the possession of the shores; while the ocean around Scotland, inasmuch as that country was (he said) in olden times tributary to the English kings, yielded to her Majesty “a mightie portion of Sea Sovereignty,” as it stretched away westwards to “that famous and very ancient Platonicall or Solonicall Atlantis.” For the same reasons Dee claimed prerogative and jurisdiction for the Queen in the northern ocean, and between Scotland