a brief note (see http://www.ee.surrey.ac.uk/Contrib/manx/manxsoc/msvol22/note_53.htm)
[March, 25, 1305.—Affreca issued a notice that she had. conceded all her rights on Man to Simon de Montacute. June 28, 1307.—Edward 1. seems to have resumed possession of Man. May 1, 1308.—Edward II. granted it to Henry de Bello Monte (Beaumont) ; but this grant seems to have been illegal, as contrary to a document signed on the 16th of March previous, so that the king, in 1310, revoked the concession, and ordered it to be delivered into the hands of Gilbert Makaskel (Mac Askel, seneschal of Anthony Bec, Bishop of Durham), and Robert de Leiburn, Constable of Cockermouth. He named Simon de Montague, then in the Isle of Man, to be admiral of the fleet against Scotland. December 15, 1311.—Edward II. orders the sheriffs and bailiffs of Cheshire, Lancashire, Cumberland, and Westmoreland, to assist Gilbert Makaskey, seneschal of Anthony Bek, Bishop of Durham, with victuals and other necessaries for the navy, in order to enable hum to defend the same against Robert Bruce, his enemy, and a traitor.

In http://www.ee.surrey.ac.uk/Contrib/manx/manxsoc/msvol01/notes2.htm (sorry many scanning errors need be fixed in this)
find
Anno 1283, Bishop 42nd, Anthony de Beck, ,archdeacon of Durham, Patriarch of Jerusalem; succeeded Anno 1311 by Richard Kellowe.' Again, in Willis's History of Cathedrals, vol. i. page 253, under the head of Archdeacons of Durham, we have-" Anno 1274, Anthony Bek held it. He was made Bishop Anno 1283;" and at page 239 we read" Anthony de Bek, or Beak, Archdeacon of Durham, succeeded (Robert do Insula) being elected July 5, 1283, and consecrated Jan. 9 following. He was a man of vast power and wealth, and by that means obtained of the Pope the Patriarchate of Jerusalem, and of the King the Princil)ality of Man. He (lied Maxeh 3, 1310" (Godwin says March 28, 1311), "and was buried in the Cathedral, behind the altar ' being the very first Bishop that presumed to lie in the church, on account Of the interment of the holy St. Cuthbert." In Beatson's Political In&x (Edinburgh, 1786 page 164, we hive the entry-"Anno 1283. 42nd Bishop, Anthony de Beck, Archdeacon of Durham, Patriarch of Jerusalem. He had also from the King the Principality of Man. Anno 1311 : 43, Richard de Kellaw." Ag-in, Bishop Godwin (Richardson's Edition do Pr(vsulibus, page 743) says of Anthony Beck-" This turbulent prelate obtained from the King, either by prayers or price, the Principality of the Isle of Man, and held it for life."

In Surtees' History of Durham we have a large account of Anthony de Beck, who is stated to have been titular King of Man for five years, having got his title from Rd. II., to compensate him for two large estates, which Ed. 1. had wrested from him, and given to two principal families, from whom Edward II. could not recover them.

Further, we have in Rymer's Foedera, vol. 2, p. 1058, 35 Ed. L, a " scire facias to Anthony Beck, Bishop of Durham, to shew cause why he should not render the Isle of Man." The following is the scirefacias issued to Anthony Beck in the 35th year of Ed. I., if the date given in Pymer be correct. Piymer, vol. ii. page 1058, Anno 1307, Ed. I. :---" Super Insilla de Man in manuin Regis resumenda. Rex Vice-Coiniti Northumbrioe, salutem. Quia per inspectionem RotuIorum ot aliori,im memorandorum qum coram consilio nostro scrutari et diligenter examinad fecimus, nobis constat, quod plures cle antecessoribus nostris, quondam Reges Anglix, cle terra de Man seisiti fucrunt, ut de jure sue, et quod nos similiter seisiti fuimus de eadem (exitus et proficientia inde perciplendo) quousque nos de gratianostra speciali seisinam terim illius talem, videlicit, qualem Alexander, quondam Rex Scotix, habuit do eadem, Johanni do Balliolo, nuper Regi Scotiw (salvo sernper jljrenostroethwredumnostrorum),fecimusliberari. Tibiproccipiiiiusqiiodscire facias venerabili Patri Antonio, Dunelmensi El)iscopo (qui proedietam terram modo tenet ut dicitur) per duos liberos et legales homines do balliva tua, quocl sit corain nobis a die Sancti Michaelis, in 15 dies ubicumque, &c. Ostensurus si quid pro se habeat vel dicere sciat, quare terram illam in maiium iiostrain utjus nostrum, resumere minime debeamus. Et habeas ibi noinina illoi-um per quos prxfato Episcopo scire feceris, et hoe breve.-Teste Re,-e apud Caldecotis, 28 die Junii. Per Consilium."

Translation of the above scire facias to Anthony Beck, concerning the Isle of Man, to be rendered into the hands of the King :-" To the Vice-Count of Northumberland, greeting. Whereas, by the inspection of the Rolls and other memoranda, which we have caused to be investigated and diligently examined in presence of our Council, it appears to us, that many of our predecessors, formerly Kings of England, were seized of the Isle of Man as of their own right, and as we, in like manner, were seized of the same, for the receiving thence the revenues and profits, until we of our special grace did grant such seizure to be rendered of that landto wit, such as Alexander, formerly King of Scotland, had of the same, to John Balliol, late King of Scotland (saving always our rights and the rights of our heirs). We direct you to call upon the Venerable Father Anthony, Bishop of Durham, who now, as it is said, holds possession of the aforesaid land, by two legal gentle. men of your district, to show cause why he should not appear before us, within fifteen days from Alichaelmas, wherever we may be, in order to show what reason he has, or what he is able to say, why we ought not by all means, to resume that land into our own hand and right. And you are to ~ave there the names of those by Yhoni you shall call upon the said Bishop to show cause, tnd that speedily. -Witness the King at Caldecot, 28th day of June. In Council."