XII.[28] We are obliged to confirm the engagements made by others, acting in our name, if it is evident that they had special, or general instructions from us to do so. And in granting a commission with full powers to any one, it may so happen that we are bound by the conduct of that agent, even if he exceed the secret instructions which he has received. For he acts upon that ostensible authority, by which we are bound to ratify whatever he does, although we may have bound him to do nothing but according to his private instructions. This rule, we must observe, applies to the promises made by ambassadors in the name of their sovereigns, when, by virtue of their public credentials, they have exceeded their private orders. XIII. From the preceding arguments, it is easy to understand how far owners of ships are answerable for the acts of the masters employed by them in those vessels, or merchants for the conduct of their factors. For natural equity will qualify the actions brought against them, according to the instructions and powers which they give. So that we may justly condemn the rigour of the Roman law, in making the owners of ships absolutely bound by all the acts of the masters employed. For this is neither consonant to natural equity, which holds it sufficient for each party to be answerable in proportion to his share, nor is it conducive to the public good. For men would be deterred from employing ships, if they lay under the perpetual fear of being answerable for the acts of their masters to an unlimited extent. And therefore in Holland, a country where trade has flourished with the greatest vigour, the Roman law has never been observed either now or at any former period. On the contrary, it is an established rule that no action can be maintained against the owner for any greater sum than the value of the ship and cargo. For a promise to convey a right, acceptance is no less necessary than in a transfer of property. And in this case there is supposed to have been a precedent request, which is the same as acceptance. Nor is this contradicted by the promises which the civil law implies every one to have made to the state, WITHOUT ANY REQUEST OR FORMAL ACCEPTANCE. XIV. A reason which has induced some to believe that the sole act of a promiser, by the law of nature, is sufficient. Our first position is not contradicted by the Roman law. For it no where says, that a promise has its full effect before acceptance, but only forbids the revocation of it which might prevent acceptance: and this effect results, not from NATURAL but from purely LEGAL rules. XV. Another question is, whether the acceptance alone of a promise is sufficient, or whether it ought to be communicated to the promiser before it can be made binding.