Who are the white rabbits?

Original A in W: "Alice continues to pursue the White Rabbit, however, and the two meet again at the croquet tournament in Chapter Eight. It is here that he's revealed to be a herald of the King and Queen of Hearts."

"Alice (2009 Miniseries): The White Rabbit is the name of a secret organization that works for the Queen of Hearts and abducts people from the real world so that they can gamble in the queen's casino. There is also a character named Agent White."

http://aliceinwonderland.wikia.com/wiki/The_White_Rabbit