Trivet, p 266.
*** Trivet, p.

128.
The great poverty of the crown, though no excuse, was probably the cause of this egregious tyranny exercised against the Jews; but Edward also practised other more honorable means of remedying that evil.

He employed a strict frugality in the management and distribution of his revenue: he engaged the parliament to vote him a fifteenth of all movables; the pope to grant him the tenth of all ecclesiastical revenues for three years; and the merchants to consent to a perpetual imposition of half a mark on every sack of wool exported, and a mark on three hundred skins.

He also issued commissions to inquire into all encroachments on the royal demesne; into the value of escheats, forfeitures, and Wardships; and into the means of repairing or improving every branch of the revenue.[*] The commissioners, in the execution of their office, began to carry matters too far against the nobility, and to question titles to estates which had been transmitted from father to son for several generations.
Earl Warrenne, who had done such eminent service in the late reign, being required to show his titles, drew his sword; and subjoined, that William the bastard had not conquered the kingdom for himself alone: his ancestor was a joint adventurer in the enterprise; and he himself was determined to maintain what had from that period remained unquestioned in his family.

The king, sensible of the danger, desisted from making further inquiries of this nature.
{1276.} But the active spirit of Edward could not long remain without employment.