What were the four traps used by Rainsford in "The Most Dangerous Game"?

Rainsford uses his know-how from years of hunting to foil Zaroff. First he sets up a trap that when sprung will make a dead tree fall. Zaroff is hit on the shoulder, but is only grazed, so he continues to track Rainsford.  Rainsford then flees into a swamp, where he digs a pit with sharp stakes, then dissimulates it with a grassy cover. This time it is Zaroff's favourite hunting dog which falls therein, but Rainsford misses his real target. Then he makes another trap by attaching a knife to a sapling, which springs back and kills Ivan, Zaroff's butler and henchman. Finally, Rainsford doubles back to the castle, and this time it is Zaroff himself who is taken by surprise in his own bedroom. It is this ambush that gives Rainsford the final advantage, and he finishes Zaroff off then and there, then crawls into Zaroff's own bed for a good night's sleep.