‘Halt! Come back!’
Horace followed, uncertainly. The bearded Ranger didn’t bother to turn in the saddle to reply to Will. But they heard him calling.
‘Come on, if you’re coming! We’re wasting time and those Temujai can’t be far behind us now!’
‘Temujai?’ Horace said to Will. ‘The Temujai are thousands of kilometres away!’
Will shook his head sadly, urging Tug to increase his pace.
‘Not in his mind,’ he said grimly. He understood now. Something had caused Halt to lose all sense of the situation and time. He was seeing enemies and events from the past. From a few months back and from years prior to that, all hopelessly jumbled in his mind.
‘Halt! Wait for me!’ he called.
Then, suddenly, he set Tug to a full gallop as his mentor threw up his arms, let out a strangled cry and fell crashing to the ground beside a thoroughly alarmed Abelard.
And lay there, unmoving.

Halt's Peril, Chapter 24