3 adjectives to describe trackers

He started again with two members of the West Australia police force, Sub-Inspector Ord and Trooper Nicholson, and native trackers.

Eager-footed, they took the trail, and even he, Koskoosh, slow of sight and an unversed tracker, could have followed it blind, it was so wide.

He was true as tried steel and in all the North woods there was no better tracker.

3 adjectives to describe  trackers