In roasting meat the gravy may be retained in it by pricking the joint all over with a fork and rubbing in pepper and salt. Mutton and beef may be underdone; veal and pork must be well cooked. Young meat generally requires more cooking than old; thus lamb and veal must be more done than mutton and beef. In frosty weather meat will require a little more time for cooking. All joints for roasting wall improve by hanging a day or so before cooking.