life, at such a time when your death is like to do more good, than your life would do without that one duty. Apply this to the present case. _Quest._ XIII. If another man deceive me into a promise or covenant against my good, am I bound to perform it when I have discovered the deceit? _Answ._ Yes, 1. In case that the law of the land, or other reasons for the public good, require it. 2. Or in case that you were faulty by negligence, heedlessness, or otherwise guilty of your own deceit, in any considerable and avoidable degree. Otherwise, in that measure that he deceived you, and in those respects, you are not obliged. _Quest._ XIV. If the contracting parties do neither of them understand the other, is it a covenant? Or if it be, whose sense must carry it? _Answ._ If they understand not each other in the essentials of the contract, it is no contract in point of conscience; except where the laws for the public safety do annex the obligation to bare external act. But if they understand not one another in some circumstances, and be equally culpable or innocent, they must come to a new agreement in those particulars; but if one party only be guilty of the misunderstanding, he must bear the loss, if the other insist on it. _Quest._ XV. Am I bound to stand to the bargains which my friend, or trustee, or servant maketh for me, when it proveth much to my injury or loss? _Answ._ Yes, 1. If they exceed not the bounds of that commission or trust which they received from you. 2. Or if they do, yet if by your former trusting and using them, or by any other sign, you have given the other party sufficient cause to suppose them intrusted by you to do what they do, so that he is deceived by your fault, you are bound at least to see that he be no loser by you; though you are not bound to make him a gainer, unless you truly signified that you authorized them to make the contract. For if it be merely your friend's or servant's error, without your fault, it doth not bind you to a third person. But how far you may be bound to pardon that error to your friend or servant, is another question; and how far you are bound to save them harmless. And that must be determined by laying together all other obligations between them and you. _Quest._ XVI. If I say I will give such or such a one this or that, am I bound thereby to do it?