As has been mentioned, Darts of to-day is essentially a "public-house game," and in pretty nearly every inn, club, or institute where it has a footing (and in which has it not!) will be found minor variations in play and often games that are peculiar to the locality or even to the "school" itself. […] And in this domestic circle, at all events, it is thought that this set of Rules will prove a useful guide when taken in conjunction with what has already been said as regards the board, its position, the hockey-line, etc.
1950, Edmond Hoyle, Lawrence H. Dawson, “Darts”, in Hoyle’s Games Modernized, 20th edition, London: Routledge & Kegan Paul; republished as The Complete Hoyle’s Games (Wordsworth Reference), Ware, Hertfordshire: Wordsworth Editions, 1994, page 457