instructed the jury, that if they shall be of opinion, from the evidence, that the goods sold and delivered by Charles Bennett to the defendant, were, at the time of the sale, the joint property of C. Bennett and J. Watts, and sold for their joint benefit, the law raises a promise from the defendant to Bennett and Watts jointly, and not to Bennett alone; and that Bennett alone cannot, in the lifetime of Watts, support this action, although the goods may have been sold in the name of Bennett, and the defendant was, at the time of the purchase, ignorant of the existence of the partnership.