Combine lemon juice and sugar in a mixing glass, stir to dissolve. Add the rest of ingredients and stir everything with ice, strain into the tall glass filled with shaved ice. "By Gene Ahern, Author of the Comic Strip ‘Room and Board’”. Editor’s note (MixologyTech for Martin’s Index of Cocktails and Mixed Drinks): included with reservations, as exemplary of mid-Century evolution/de-evolution in mixed drinks. The original text refers to “very light Haiti rum” which you can either interpret as a light rum from Haiti or a refined Haitian brown rum (in which case, any Barbancourt brown rum should work).