It is this sum of 2.1 Million Dollars (U.S) being the Unpaid Regular Interest, wrongly deducted and wrongly withheld and kept with themselves by Renusagar from 1970 onwards which is the first claim referred by G.E.C. to the arbitration of I.C.C. As regards the latter it may be stated that on account of the alleged delays in the shipment and erection schedule Renusagar requested G.E.C to grant deferment in the payment schedule and as a result of the negotiations that ensued, Renusagar and G.E.C., inter alia, purported to amend the dates of payment of the purchase price evidenced by the promissory notes and certain decisions in that be half were recorded in a Memorandum dated December 30, 1966 and letters dated January 5, 1967, October 4, 1967 and October 9, 1967; this purported re scheduling of the dates of payment of the purchase price as arrived at by the aforesaid documents was sought to be reflected by the parties in the said Contract I.G.E. 9584 by executing a formal Amendment dated October 1, 1968 thereto.