"I have in vain endeavored however to find a definition of that which is between a certainty and an expectation; nor am I able to point out what is an interest unless it be right in the property or a right in the property or a right derived out of some contract about the property which in either case may be lost upon some contingency affecting the position or enjoyment of the party" Per Lord Eldon in Lucena v Craufurd (1806)2 Bos and PNR 269 .Discuss