4 wedges lime (2 oz, 6 cl, 1/2 gills)
2 to 3 teaspoons granulated sugar (1 cl, 1/16 gills)
8 to 10 fresh mint leaves (4 oz, 12 cl, 1 gills)
2 ounces light rum (6 cl, 1/2 gills)
Muddle the lime wedges, sugar, and mint leaves in a mixing glass until the sugar is completely dissolved, all the juice is extracted from the limes, and the mint is thoroughly integrated into the juice. Add ice, and the rum, to the mixing glass, shake briefly, and strain into a collins glass filled with crushed ice. Top with club soda, and add the garnish.
Serve in a collins glass (12.0 oz)