The result of the authorities seems to be that, without the aid of a statute, an expert cannot be compelled to bestow his skill and professional experience gratuitously upon any party, for his skill and experience are his individual capital and property. |32| CHAPTER III. WHO SHOULD PAY THE DOCTOR. If Smith says to Brown, a medical man, “Attend upon Robinson, and if he does not pay you I will;” that being a promise to answer for a debt of Robinson’s, for which he is also liable, the guarantee is only a collateral undertaking, and, under the Statute of Frauds, must be in writing and signed by Smith, or some other person thereunto by him lawfully authorised, in order to be binding upon him. But if Smith says to Dr. Brown, absolutely and unqualifiedly, “Attend upon Robinson, and charge your bill to me,” or “I will pay you for your attendance upon Robinson;” then the whole credit being given to Smith, no written agreement is necessary to enable the doctor to recover the amount of his account from him, since it is absolutely the debt of Smith [63]. Where a person calls at the office of a physician, and, he being absent, the visitor leaves his business card with these words written on it, “Call on Mrs. Jones, at No. 769 High Street,” handing it to the clerk in attendance, with the request that he would give it to the doctor and tell him to go as soon as possible; this caller becomes liable to pay the doctor’s bill for attendance upon Mrs. Jones in pursuance of such message. Yet Mrs. Jones, if a widow, may also be liable; for one who acquiesces in the employment of a physician, and implies, by his or her conduct, that the doctor is attending at his or her request, is responsible for |33| the value of his services. If Mrs. Jones is living with her husband, or, without her fault, away from him, the doctor has still another string to his bow, and may recover the amount of his bill from Mr. Jones; for the rule is, that a husband must pay his wife’s doctor’s bills. Of course the doctor cannot make all three pay [64].