Allow the juice and grated rind of one lemon to every five oranges. Weigh the fruit before cutting it, and allow three quarters of a pound of sugar to a pound of fruit. Remove the peel in quarters, and boil it in plenty of water until it is tender enough to pierce easily with a broom-straw; then drain off the water and let it cool. Remove the seeds and as much of the skin as possible from the pulp. Boil the pulp with the sugar until the orange is well cooked. When the peel is cool take one piece at a time in the palm of the hand, and with a tablespoon cut out all the white pithy part, leaving the thin yellow rind. Place a number of these pieces together, and with a sharp knife cut them into thin shreds. By cutting many together in this way it is done quickly. Add the shredded rinds to the cooked oranges and let them cook until of the right consistency. It should be very thick, but not solid like jelly. This is a very good marmalade, and resembles the Dundee brand.