I had the same inspiration as Jim and made essentially the same drink in the form of a Savoy Manhattan Cocktail No. 1, although I had to double the rye.
Manhattan Cocktail (No. 1)
Use small Bar glass.
2 Dashes Curacao or Maraschino.
1 Pony Rye Whisky (ok, two pony glasses of Russell's Rye)
1 Wineglass Vermouth (Mixed -- Dolin Dry and Perucchi Italian)
3 Dashes Angostura Bitters (3 dashes Fees Old Fashioned Bitters)
Shake up well (stir), and strain into a claret glass. Put a quarter of a slice of lemon In the glass and serve. If preferred very sweet add two dashes of gum syrup.