Place 4 tea
bags and 12 mint sprigs into a large bowl. Pour boiling water over
them, and allow to soak for about 8 minutes. Remove and discard the tea
bags and mint leaves, squeezing out excess liquid. Stir in 1 cup sugar
until dissolved, then pour in 1 cup orange juice and 1/4 lemon
juice. Pour in the cold water. Serve over ice cubes, garnished with
orange or lemon slices.