Have hare skinned, cleaned, and neatly jointed, reserving the blood and liver. Mix the blood with the vinegar to prevent it curdling and keep in a cool place. Dust the joints with seasoned flour and fry in oil to a deep golden brown; transfer to a deep oven-proof dish, pour over enough stock to cover, add onion, herbs, mace & nutmeg. Cover with lid, bring to a boil and place in 350 degree oven for 3 hours. Serve garnished with diced, fried liver. Strain the cooking liquid into a pan and reboil. Add jelly and pour a little of the liquid into the blood, stirring until smooth. Blend blood into gravy had heat to thicken, but do not boil; add port or claret, season with salt & pepper, and pour over the meat.