If, in a deed of land, or a conveyance by writing of personal property, made by one as attorney in fact for another, the words of conveyance or the signature be in the name of the attorney, it shall be as much the principal's deed or conveyance as if the words of conveyance or the signature were in the name of the principal by the attorney, if it be manifest on the face of the instrument that it should be construed to be that of the principal to give effect to its intent.