After Prideaux's death in August 1659, it transpired that his interest in the letter office had not ceased when he ceased to administer it. What was the interest he retained we do not know; but the matter seems to have been considered sufficiently serious to call for parliamentary inquiry. In the following February the House of Commons ordered "that the whole business concerning the Post Office, and what has been received by Mr. Prideaux, late Attorney-General, out of the same, and what account hath been made thereof he referred to a committee to examine, and to state matter of fact and report it to the Parliament and their opinion therein." To this order, however, no return appears to have been made. It is probable that at the Restoration the committee had not concluded its labours. Oldmixon speaks of Prideaux as "a very fierce republican, who got a great estate by his zeal against the Church and Churchmen"; and it is certain that to that estate his zeal for the Post Office brought him no inconsiderable addition. Of the destination of a part of his wealth we are not left uninformed. Towards the close of the century a judge, before whose ferocity even Prideaux's pales, set out on a circuit, the infamy of which will endure to the end of time. Arrived in Somersetshire, he found residing at Ford Abbey, in the neighbourhood of Axminster, an inoffensive country squire, son of the former Master of the Posts, and named after him, Edmund Prideaux. From this gentleman, apparently because he was his father's son, and for no better reason, Jeffreys under threat of the gallows extorted £15,000, and he bought with the money an estate "to which," Lord Macaulay tells us, "the people gave the name of Aceldama, from that accursed field which was purchased with the price of innocent blood."