1862
New York publication; evidence of American bar practice
Provides a precise primary-source milestone showing that ice, shaking, and straining were embedded in a published American whiskey-cocktail specification by 1862.
Verified against the complete 263-scan-page public-domain source and a high-resolution rendering of printed page 50 / scan page 55. This exact event is publication-ready. It does not resolve the broader question of when icing became routine nationwide or prove Wondrich’s separate mainly-the-1850s synthesis.
Jerry Thomas’s 1862 bar manual specifies a Whiskey Cocktail made with fine ice, shaken, and strained into a wine-glass.
Documentary milestone
Jerry Thomas’s 1862 How to Mix Drinks gives a numbered Whiskey Cocktail formula and instructs the bartender to fill the vessel one-third full of fine ice, shake, and strain the drink into a fancy red wine-glass.
Evidence boundary
The complete primary source has been processed and preserved. This event establishes what Thomas published in 1862; it does not identify the first iced cocktail, date the beginning of the practice, or prove uniform adoption across the United States.
Evidence chain
The event is connected to a Verified factual Claim, a verified direct-quote Excerpt, a Ready page-specific Citation, and a complete primary Source marked Full Source Verified.