Craddock lifted this recipe from Harry & Wynn Barflies 1927. The first recipe was in the 1903 Daly's bartenders guidel but quite different: 50/50 Jamaican Rum and Vermouth with dashes of Kummel and gum syrup. Another in the 1903 Flowing Bowl had 50/50 gin & Vermouth. Much earlier The Greenville Journal Fri, 01 Sep 1882 ·Page 1 says it is an alternative name for a Manhattan. Hope this is useful Simon