they had already travelled over an hour , and it was light travel compared to the days beforea welcome change , but ifferon knew well that herrdon was not exaggerating about the journey that awaited them in the cliffhills , nor the troubles and terrors of ardn-f. on many occasions he felt himself drift off into a dark trail of thought , getting lost there for a moment until herrdon drew him back like the unsheathing of his sword .