On broken terrain, Doc on his grabb made better time than anyone, with the possible exception of Einstein, who was a gifted scrambler. The two of them would surge ahead and then Beled would put on a loping burst and catch up, obeying some kind of instinct to take point. Langobard seemed more inclined to hang back and act as a rear guard, which meant he spent more time in the company of the slower Ariane. Sometimes he simply picked her up and carried her over rough patches. The valley had been flat higher up, but they had to negotiate a steeper transition down to the altitude where vegetation had been seeded by the ONANs. It then became easier going, though they had to find open trails among the dense low shrubs that had taken root in the ashy soil. Their feet and their noses told them that the ground had been preseeded with some kind of microorganism that had presumably been designed to convert volcanic ash—which tended to have toxic stuff like sulfur in it—to a more wholesome kind of soil.