IN RE ARMAH (DECD.); ARMAH v. ARMAH Administration of estates—Letters of administration—Caveat—Application by plaintiff for grant—Caveat by defendant—Failure by parties to agree on one entitled to grant—Plaintiff taking out writ of summons under Order 60, r. 21(2) of L.N. 140A—Whether defendant need counterclaim—High Court (Civil Procedure) Rules, 1954 (L.N. 140A), Order 60, r. 21(2).