A mixture of two malt liquors, especially ale and porter.Fair enough. So how does David Parker (Everyman 1994) gloss it?
A mixture of two malt liquors, especially ale and porter.That feels ... familiar, somehow. What will you do?
“half-and-half” One of a variety of possible mixtures of alcoholic drinks; either mild ale and bitter, or Scotch ale and India Pale Ale (especially in the north), or (in Ireland) ale and Guinness.Of course, that took you almost a minute of research online, in the 19th-century sources on Google Books. Almost a full minute!