Name the sport Rainsford considers to be the best in the world.

Rainsford considers hunting to be the best sport in the world.

"It will be light enough in Rio," promised Whitney. "We should make it in a few days. I hope the jaguar guns have come from Purdey's. We should have some good hunting up the Amazon. Great sport, hunting."
"The best sport in the world," agreed Rainsford.