233. Procedure where codicil discovered after grant. If, after the grant of letters of administration with the will annexed, a codicil is discovered, it may be added to the grant on due proof and identification, and the grant altered and amended accordingly. Revocation of grants. 234. Revocation or annulment for just cause. (1) The grant of probate or letters of administration may be revoked or annulled for just cause. (2) (a) (b) (c) (d) (e) In this section, “just cause” means— that the proceedings to obtain the grant were defective in substance; that the grant was obtained fraudulently by making a false suggestion, or by concealing from the court something material to the case; that the grant was obtained by means of an untrue allegation of a fact essential in point of law to justify the grant, though the allegation was made in ignorance or inadvertently; that the grant has become useless and inoperative through circumstances; or that the person to whom the grant was made has wilfully and without reasonable cause omitted to exhibit an inventory or account in accordance with Part XXXIV of this Act, or has exhibited under that Part an inventory or account which is untrue in a material respect. PART XXXI—PRACTICE IN GRANTING AND REVOKING PROBATES AND LETTERS OF ADMINISTRATION. 235. Jurisdiction to grant probate and letters of administration. (1) Jurisdiction to grant probate and letters of administration under this Act shall be exercised by the High Court and a magistrate’s court in accordance with the Administration of Estates (Small Estates) (Special Provisions) Act. (2) Any reference in this or any other Part of this Act to “a district