We are of opinion that the contract was specifically enforceable. We reject the contention that a contract, some part of which is not immediately performable, is not capable of specific performance. In our opinion proceedings for the specific performance of a contract which is of such a kind that it can be specifically enforced can be commenced as soon as one party threatens to refuse to perform the contract or any part thereof or actually refuses to perform any promise for which the time of performance has arrived. The court can then make a decree that the contract ought to be specifically performed and carried into execution, and can so mould its decree and order such inquiries, accounts and other proceedings under the decree as may be necessary to carry into effect all the promises of both parties whether they are presently performable or are only performable in the future. The statement of Dixon J. in J. C. Williamson Ltd. v. Lukey [1] that "the remedy (of specific performance) is not available unless complete relief can be given, and the contract carried into full and final execution so that the parties are put in the relation contemplated by their agreement" relied upon by counsel for the appellant lends no support to his submission. His Honour was discussing the kind of contract that is capable of specific performance and not the time at which a suit for the specific performance of such a contract may be instituted. In the present case the only terms of the agreement not presently performable at the date of the writ were the terms for the payment of the instalments which had not then become payable and Nives v. Nives [2] is a direct authority that a vendor whose purchase money is payable by instalments, some of which are not yet payable, can obtain a decree for specific performance and an order for payment of the instalments that are overdue, the plaintiff to have liberty to apply in respect of future instalments as they become payable. We are of opinion that where the contract is of such a kind that the purchaser can sue for specific performance, the vendor can also sue for specific performance, although the claim is merely to recover a sum of money and that he can do so although at the date of the writ the contract has been fully performed except for the payment of the purchase money or some part thereof. The law is, we think, correctly stated by Nicholas J. (as he then was) in Eastwood-Epping Ice & Fuel Co. Ltd. v. Pittock [1] : "The right of a vendor to sue for a decree in equity that payment should be made according to a contract, although it is a claim for a money payment only, appears to be an additional right recognized in every case in which the other party to the contract might have sued for specific performance had he been the party complaining of the breach (see Fry on Specific Performance, 6th ed. (1921) p. 33; Maitland on Equity , 1st ed. (1936), p. 239). In Clifford v. Turrell [2] it was said by Knight-Bruce V.C. - "A case is stated in which, setting the Statute of Frauds out of the question, a bill might have been maintained by the defendant against the plaintiff, to compel him to execute the assignment. That, therefore, is a reason to compel the performance of the terms upon which the plaintiff agreed to execute the assignment." This decision was confirmed by Lord Lyndhurst [3] on this aspect upon the ground that damages would have proved an inadequate remedy. But in Walker v. Eastern Counties Railway Co. [4] , Wigram V.C. used similar reasoning to that of Knight-Bruce V.C., saying that the jurisdiction cannot be denied in a converse case in which the vendor is plaintiff". The case of Cogent v. Gibson [5] is directly in point. There Lord Romilly held that a contract for the sale of a patent was specifically enforceable at the suit of the vendor, although all he required was the payment of the purchase money. The case of Brough v. Oddy [1] was relied on by counsel for the appellant. But the contract there in question was simply a contract under which one party upon the happening of an event agreed to pay periodical sums of money to the other party. It was not a contract of the class which would have attracted the equitable remedy of specific performance at the suit of either party.