Publish with three layers of support: cite Wondrich for the mainly-1850s synthesis; cite Tomes 1855 for a direct mid-decade iced preparation tied to commercial ice transport; cite Thomas 1862 for the explicit Whiskey Cocktail technique. Terrell/Library of Congress supports the enabling ice-supply context.
David Wondrich's synthesis places the broad, uneven establishment of routine cocktail icing mainly in the 1850s. Independent primary evidence brackets that transition: Robert Tomes documents a commercially supplied iced cocktail preparation in 1855, and Jerry Thomas codifies fine ice, shaking, and straining for a Whiskey Cocktail in 1862.
Triangulated on 2026-09-01. Wondrich supplies the decade-level interpretive synthesis. Tomes's complete 1855 primary source independently documents a Champagne cock-tail made with pounded crystal ice shipped from Rockland, bitters, sugar, and Champagne in Aspinwall. Thomas's complete 1862 manual independently documents a Whiskey Cocktail made with fine ice, shaken, and strained. The Library of Congress provides institutional context for natural-ice commerce, the 1851 Gorrie patent, and subsequent urban ice-factory growth.
State this as an uneven development, not an abrupt nationwide switch. The Tomes episode occurs in Aspinwall within an American travel and railroad-commercial network, and the Thomas manual establishes codification by 1862. Neither source proves that no earlier iced cocktails existed or that every American bar adopted the method in the same decade.
A later manual alone could not validate the 1850s timing. The new 1855 firsthand preparation and independent institutional history of ice commerce provide the missing mid-decade and infrastructure corroboration. Together with Wondrich's synthesis and Thomas's 1862 codification, the claim is publishable when explicitly attributed and qualified.
Used and link-verified on the public history page “Expansion and Industrialization — Cities, Ice, Warehouses, and Factory Systems” on 2026-09-02. Retain the recorded qualifications in future revisions.