( 1 ) THIS is a petition under Section 20 of the Arbitration Act for filing of arbitration agreement and appointment of an arbitrator. The Plaintiff entered into contract with the defendants for the execution of the work of "construction of Delhi Side approach on Mai Mathura Road near Bhogal" and agreement No. SEDS/64 of 1956-57 was executed between the parties. The contract contained arbitration clause No. 25 under which it is provided that the disputes shall be referred to the Chief Engineer, Central Public Works Department and if he is unable or unwilling to act, to the sole arbitration of some other person to be apointed by him. Disputes arose between the parties and the plaintiff vide his letter dated 14th June, 1961 invoked the arbitration clause and required the defendants to appoint an arbitrator for adjudication of thirteen disputes detailed therein (Annexure B) to the petition. The Chief Engineer, vide letter dated 26th October, 1961 (Annexure-C) appointed an arbitrator to decide the disputes mentioned by the plaintiff except the disputes at items Nos, 10, 11, 12 (a), 12 (b), 12 (c) and 13 of Annexure-B, There was prose cution of the plaintiff and some officer