Direct consumer-spirit combination example, but it is a punch with modifiers, not a neat whiskey blend. The suggested gin pairing has no fixed internal proportion in this recipe. Do not invent one. Origin anecdotes and the three-temperature Negroni observation remain attributed.
2017 edition, supplied 232-page PDF. All readable content and page images reviewed; copyright text partly obscured on PDF8. This located passage is readable. Author-attributed content, not independent factual verification.
Broom presents classic cocktail structures as adjustable rather than fixed universal ratios. The Martini discussion makes ingredient choice and proportion personal; the Negroni uses vermouth as a sensory bridge. A Gin Punch recipe explicitly suggests combining Portobello Road and Hayman's Royal Dock within the gin portion.
195
188
PDF pagination — Martini, Negroni, Collins and Gin Punch
Source-fidelity and PDF locators checked in extracted text and page images. Direct consumer-spirit combination example, but it is a punch with modifiers, not a neat whiskey blend. The suggested gin pairing has no fixed internal proportion in this recipe. Do not invent one. Origin anecdotes and the three-temperature Negroni observation remain attributed.
No access / Whiskey Excerpts Database (USWA)
Source-faithful paraphrase, not independent corroboration.
Evidence
Broom presents classic cocktail structures as adjustable rather than fixed universal ratios. The Martini discussion makes ingredient choice and proportion personal; the Negroni uses vermouth as a sensory bridge. A Gin Punch recipe explicitly suggests combining Portobello Road and Hayman's Royal Dock within the gin portion.
Location and context
No access, 2017 edition; PDF 188–195 (printed 184–191); Martini, Negroni, Collins and Gin Punch. The located text is readable; the separate PDF 8 copyright hold remains.
Analysis: 
Annotation
Direct consumer-spirit combination example, but it is a punch with modifiers, not a neat whiskey blend. The suggested gin pairing has no fixed internal proportion in this recipe. Do not invent one. Origin anecdotes and the three-temperature Negroni observation remain attributed.