Hipped by a friend when in New York lately I visited the Campbell Apartment, which is a bar set up in the former office of a transport executive from the mid-1900's. It is located in, and on the west side of, Grand Central Terminal. Charming locale and I was interested that the menu offers a number of vintage cocktails.
One, the Commodore, drew my attention in particular. It is a mix of bourbon, creme de cacao, lemon juice and grenadine. It was very well made, resulting in a whiskey-driven palate tempered by a sweet-sour note from the citrus and grenadine. The cocoa flavor was light but noticeable and blended well with the barrel notes of the bourbon - the house used Maker's Mark and I didn't demur.
A fine drink indeed which I'll try to duplicate at home.
By the way I finally found Ted Haigh's book on vintage spirits and cocktails mentioned in another thread recently. Excellent book for its accurate but easy going commentary, numerous, often intriguing recipes, and the reproductions of old ads and bottles - all very well done.