Whether unstamped agreement for sale and unregistered vendor’s mortgage are enforceable in equity - Whether equitable mortgagee is entitled to possession of mortgaged Property on default by equitable mortgagors - Whether purchasers and equitable mortgagors of land entitled to an order of specific performance commanding the vendor and equitable mortgagee to register transfer of property to them - Exercise of inherent jurisdiction to make declaratory reliefs as to parties’ status in relation to the property in lieu of order for specific performance.