The bookmaker frames a niche giving odds on every horse inside the race. Gamblers then bet on his or her selection to win or place. In most cases, the purpose of the bookmaker would be to frame an industry and take wagers that ensure that they will win irrespective of the response to the race. This is done by "reducing" that is a term for a bookmaker betting on the horse with another bookmaker(bukmacher), or even the TAB, to scale back his liability should it win.
A Government licence is needed for a bookmaker to field over a racetrack. Often punters who cannot reach a horse race meeting would bet with illegal bookmakers, called SP bookmakers. SP stood for starting price, and they would provide you with the official starting odds of a jogger. As these were often not known until well as soon as the race meeting was finished, SP bookmakers(bukmacherzy) would usually have a settling day, when all punters tummy flatness, although and settle their bets as well as the winning ones receive their payouts.
Klub Graczy: Runners as they helped who does visit the neighbourhood collecting wagers from clients in their own individual houses, at the local hotel, at the spine streets and so forth. Cockies short for Cockatoos who does be placed in positions of high points and other keen viewing advantages to warn Runners and Bookmakers of approaching law authorities.
Evidently this was all illegal however the authorities were slow to do something and didn't realise the magnitude of income being generated by this activity within the racing industry. In fact police often turned a blind eye to this since it seemed harmless and was basically the SP bookmaker(bukmacher) supplying an email finder service for the public.