It is convenient to state first why we think that he has made out a prima-facie case of a collateral promise or warranty that the areas in question shall be used as a park or parks and not otherwise. The question is very much one of fact. But it appears to us that in formulating Housing Project No. 4 as part of the Ryde Housing Scheme the Council was putting forward something conceived as an entirety. The purpose of such a project, as the pamphlet makes clear, was to provide a design, coherent, integrated and complete in itself, for the forming of a new habitable locality possessing specific features. The basal purpose of the design was to afford an environment and amenities calculated to enhance the living conditions of the inhabitants of the area. The project, on its face, appeared to confer upon the purchaser to whom a subdivisional lot was allocated a share in the enjoyment of the environment so formed. For the purposes of this interlocutory proceeding the inference must be made that this was done with the full authority of the Council and that the housing officer and his clerical assistants at the Council's housing branch were put there to produce the plan and expound the project to intending purchasers. The plan records in diagrammatic form the features of the project of which the subdivision into lots is only a part. When a prospective purchaser was invited to buy a lot with a home erected upon it, it was upon the footing of the project, the existence and effectiveness of which was, as it appears to us, an assumption from which the transaction was intended to proceed. The allocation of an individual lot to the purchaser, his acceptance of the allocation and the execution of a contract for the purchase of that lot necessarily supposed the prior formulation of Housing Project No. 4 as the foundation of the transaction. Unless the main features of the project were fixed, it would be meaningless. It is, we think, a reasonable construction of the Council's action in putting forward the project as the basis upon which the intending purchaser could proceed, if it is treated as amounting to or involving an undertaking or promise by the Council to him that they would adhere to and maintain the project, if he would become a purchaser of a lot which he might select and they might allocate to him. The reluctance of courts to hold that collateral warranties or promises are given or made in consideration of the making of a contract is traditional. But a chief reason for this is that too often the collateral warranty put forward is one that you would expect to find its place naturally in the principal contract. In a case like the present it is, we think, otherwise. Doubtless the main contract might have included a clause by which the Council undertook not to depart from the housing scheme. But it seems to be not unnatural that the parties should treat the contract as devoted to the purchase of the lot which the individual purchaser acquired, the existence and stability of the project of which the transaction was an outcome being presupposed as something antecedent upon which the purchaser might implicitly rely. It is the common intention that he would so rely upon it and on that basis proceed to contract to buy the particular lot allocated to him. It is because of this that the assurance which is embodied in the plan, when it is read in the light of the pamphlet, obtains its effect as a collateral promise. In a case with many analogies a similar conclusion of fact or finding was upheld both by a Divisional Court and the Court of Appeal. It is Jameson v. Kinmell Bay Land Co. Ltd. [1] . The defendant owned land on Kinmell Bay in North Wales and proceeded to develop it as a seaside residential estate. The plaintiff inspected the estate and was minded to buy an allotment. He was told that a road was to be constructed close to the allotment. He entered into a contract to buy it and ultimately took a conveyance which referred to "the frontage to the proposed new road together with a right of way along it". Talbot J. said "It was said that the oral promise relied on was collateral to the written contract for the purchase of the plot. If set out in detail it would have taken the form of an agreement by the defendants that in consideration of the plaintiff's entering into the contract of purchase at the price and on the terms stated the vendors would undertake to make a road on the line shown as Towyn-way on the plan and would complete that road by the time the bungalow was finished. Such a promise could be binding, as appeared from the case of Erskine v. Adeane [1] . The County Court Judge held that the promise was a warranty, as it went to the root of the contract and was collateral to it. He thought that this meant that the promise was the consideration for entering into the contract and that it was in no way contradictory to the conveyance" [2] . His Lordship decided that there was no error in law in this conclusion. Finlay J. was of a like opinion. In the Court of Appeal [3] , Lord Hanworth M.R. said that Erskine v. Adeane [1] and other cases had abundantly proved there might be, as in the case before him, a contract which accompanied a sale of land and yet was separate from it. The Master of the Rolls thought the findings fully justified. Lawrence and Romer L.JJ. agreed.