A thing which is not in esse but in apparent expectancy is regarded in law.
And the law, that is the perfection of reason, cannot suffer anything that is inconvenient.
The agreement of the parties cannot make that good which the law maketh void.
Everyone thirsteth after gaine.
We have a saying in the House of Commons; that old ways are the safest and surest ways.
So use your own property as not to injure that of another