Mark Twain Cocktail

from The Craft of the Cocktail

• 1.5 ounces Scotch Whisky
• .75 ounce Lemon Juice
• 1 ounce Simple Syrup
• 2 dashes Angostura Bitters

Shake all the ingredients with ice and strain into a chilled cocktail glass.

As described to his wife in a letter from London, 1874.