But great drinks, made with homemade bitters and drams, are what made Nathaniel legendary before the Jewel Box ever opened…At the bar a short cocktail menu changes weekly. They are indeed well-crafted and beautiful in their glass. On a recent visit the best was the bourbon-based, turbid, and frothy-textured Lion’s Tail. An allspice dram adds some rum sweetness and warm spice, and lime gives it a sour bite. The Japanese cocktail had a candied lemon flavor, with a darker licorice underneath. A Boulevardier had a syrupy depth with orange and spice. And the Martinez, reddish and thin, in a lovely glass with curving ribs, sweetens and spices the martini with a dash of maraschino liqueur and various bitters.