American and Other Drinks by Leo Engel (1878, p.90)

1 wholeegg — new-laidbase
Soda water — balancedilution
1 liqueur glassBenedictine modifier
champagne — half fill after shakingother
ice — a littleother
1 tablespoonRaspberry syrup sweetener
  1. Shake the egg, Benedictine, raspberry syrup, and a little ice, then half fill with champagne, top with soda water, stir, and strain through a fine sieve.

Ice: A little ice

From Leo's Specialities at the Criterion.