In theory there an almost infinite number of possible positions.
The Apache did not play billiards or pool prior to 1900. Since that time, it is unknown how many Apache have played pool or billiards.
There are many companies that specialize in offering classic billiards game tables. Online, one can order the billiards games tables from Classic Games and Billiards and Overstock.
There are many very good books on how to learn billiards. Two of these are The Complete Idiot's Guide to Pool and Billiards and The Illustrated Principles of Pool and Billiards.
2
Billiards at Half-past Nine has 280 pages.
In true Billiards there is only 1 red ball. In snooker there are 15 reds.
2
Eight.
In English Billiards there are 3 balls. White, white with spot (or yellow ball) and red.
Billiards is no longer there.
It doesn't. There is no "mat" related to the game of English Billiards or Pocket Billiards.
This depends upon which billiards game - English Billiards is most popular in the UK. Pocket Billiards is most popular in the US.