Cooling Cups and Dainty Drinks by William Terrington (1869, p.187) — Terrington 1869

1 pintDublin stout base
1 pintLondon porter other
  1. Mix the Dublin stout and London porter and serve.

A good example of named nineteenth-century beer blending rather than spirit-driven mixing.

The distinction is entirely in the chosen beer pair.

See also: Mother-in-law, John Bright, Shandy Gaff