http://paranoia.lycaeum.org/alcohol/guiness-faq
III. "Black and Tan"
Q: What is a Black & Tan? What is a Half-and-Half?
A: The answer depends on who you ask. The all-Guinness Black &
Tan is Harp's Lager and Guinness. (Harp's is brewed by
Guinness at Dundalk). Many consider the classic Black & Tan
to be Bass Pale Ale and Guinness. (To some Irish, they
appreciate the fact that the Irish comes out on top!) I've
been in a pub that used Smithwicks and Guinness.
(Smithwicks is also owned by Guinness.) However, there are
many variations involving a stout or porter and another
lighter coloured beer, either lager or ale. The Black & Tan
name is derived from hunting dogs that had a black and tan
mottled colouring. There was also a regiment of British
soldiers recruited to serve in Ireland after the First World
War. They had a reputation for being quite brutal.
A half-and-half is often just another name for a Black &
Tan. However, in many North American Irish pubs, the
Bass/Guinness combination is called a Black & Tan, while the
Harp/Guinness combination is called a Half-and-Half.
Guinness promotional advertising refers to a Black & Tan as
being the Bass and Guinness version. Ken Papai described
the ads as follows:
Here is the Guinness Import Company (c) 1992 ad on
their beer card/beer coaster that they distribute at
pubs and beer shows:
-----------------------http://www.ivo.se/guinness/bnt.htmlhttp://www.thetailgater.com/archive/032000tipomonth.html-------------------------http://www.localpubs.com/nina's/menu.htm
SPECIAL BLENDS
Half & Half (Harp & Guiness)
Black & Tan (Bass & Guiness)
Bumble Bee (Honey Brown & Guiness)
Snake-Bite (Apple Cider & Guiness)