1937 Here is Something that will interest you (3 rd edition)

THE COMPLEAT DART THROWER DARTS is one of the finest games of skill ever invented. It demands a keen eye,a steady hand, mental judgment and a head for figures and for beer. The dart board is circular,two inches thick and eighteen inches in diameter; its face is divided by wires into twenty segments valued from i to 20in irregular sequence. The Bull's-eye, a half-inch circle, counts 50 and the "outer" 25. In addition there are two circular strips, the outer strip cotmting double the number of the segment concerned and the inner strip treble. The boardstandsfivefeeteightinchesfrom the Bull's- eye to the ground,the thrower stands nine feet away from the board and the loser stands everyone a drink. Three darts are used, each player throwing all of them in turn. Scoring—Before a player can score, a dart must be lodged in the narrow double strip; after this,each dart scores according to the values stated above. The total score required is always an odd number—usually 301 or 501 (looi in team games). Each score obtained is subtracted from the agreed total and the winner is he who first reaches o with a double ... It is essential to end with a double. (N.B.—^The references herein to a double relate to numbers, but there is nothing in the rules preventing the winner ending with another kind of"double") 36