1855
Aspinwall, New Granada (present-day Colón, Panama); linked to Rockland ice commerce and American travel
The account supplies direct mid-1850s evidence that commercially transported ice had entered mixed-drink preparation within an American travel and railroad-commercial network. It links shipping, ice supply, bar technique, and sensory service while showing that cocktail practice moved through transnational routes.
Verified against the complete 1855 book, printed pages 61–63. Date is exact only to the publication year; the account describes Tomes's 1855 journey. Do not frame this as the first iced cocktail or as proof of nationwide routine adoption.
Robert Tomes described a Champagne cock-tail made by pounding crystal ice shipped from Rockland, placing it in tumblers, adding bitters and sugar, and pouring Champagne.
Evidence boundary
This milestone is supported by Robert Tomes's complete 1855 travelogue, printed pages 61–63. It establishes a documented preparation in Aspinwall using commercially shipped Rockland ice, bitters, sugar, and Champagne. It does not establish invention, first use, or uniform practice across the United States.