What is the first thing Rainsford does to lose Zaroff

The first thing Rainsford did was give Zaroff a trail to follow.

"I'll give him a trail to follow," muttered Rainsford, and he struck off from the rude path he had been following into the trackless wilderness. He executed a series of intricate loops; he doubled on his trail again and again, recalling all the lore of the fox hunt, and all the dodges of the fox.