THIS is true in contracts,* 1.1 and acts of donation, in vowes and dedition, and all rely upon the same reason. He that cannot give, and he that cannot be given cannot contract or be contracted with. Titius intends to marry Cor∣nelia's servant, because he desires to have children, and to live comfortably with the wife of his youth. He does so; and in their first access he finds her whom he thought to be a woman, to be an Eunuch; and therefore not a person capable of making such a contract: she did ill in contracting, but she hath done nothing at all besides that ill, for the contract is void by the in∣capacity of the person.
Upon this account the Lawyers amongst the causes of the Nullities of marriage reckon Error personae,* 1.2 the mistake of the person; though certainly this is not to be extended beyond the meer incapacities of Nature, if we speak of Natural nullities. Thus if I contract with Millenia whom I suppose to be a Lady, and she proves to be a servant, or of mean extraction, though if she did deceive me she did ill in it; yet if she could naturally verifie that contract, that is, doe all the offices of a wife, the contract is not naturally void; whe∣ther it be void upon a civil account is not here to be enquired: but by the law of Nature it is void, onely if by nature it cannot be consummate. For by a civil inconvenience or mistake the contracts of Nature cannot be Naturally invalid; because that is after Nature and of another consideration, and of a different matter. For that a mans wife should be rich, or free, is no more of the necessity of the contract of Marriage, then it is that she should be good natur'd, or healthful: with this onely difference, that if a man contracts upon certain conditions, the contract is void if the conditions be not verified; and for those things which are present and actual he can contract, but not for what is future, contingent and potential. A man may contract with a maiden to take her for his wife if she be free, or if she have such a portion; but not upon con∣dition that she shall be healthful for seven years. Because whatever condition can be stipulated for must be actual before consummation of the Marriage: afterwards it is for better or worse: the want of any such condition is not so great an evil to the man as it is to the woman to be left after she is dishonour'd. So that if it be a thing which can be contracted for, and be actually contracted for, in the destitution of the condition the contract is void. But if there be no such express stipulation made, there is nothing can be made a nullity by na∣ture, but that which is a natural incapacity: and therefore if a Gentleman