"One thing at a time, and don't rush your fences." Ashe was surveying him with an odd intentness which Ross could not understand. He continued to explain in his "instructor" voice. "We made it down the river--how, don't ask me. That was something of a 'project' in itself," he laughed. "The raft came apart piece by piece, and we waded most of the last couple of miles, I think. I'm none too clear on the details; you'll have to get those out of McNeil, who was still among those present then. Other than that, we cannot compete with your adventures. We built a signal fire and sat by it toasting our shins for a few days, until the sub came to collect us----" "And took you off." Ross experienced a fleeting return of that hollow feeling he had known on the shore when the still-warm coals of the signal fire had told him the story of his too-late arrival. "And took us off. But Kelgarries agreed to spin out our waiting period for another twenty-four hours, in case you did manage to survive that toss you took into the river. Then we sighted your spectacular display of fireworks on the beach, and the rest was easy." "The ship people didn't trace us back to post?" "Not that we know of. Anyway, we've closed down the post on that time level. You might be interested in a very peculiar tale our modern agents have picked up, floating over and under the iron curtain. A blast went off in the Baltic region of this time, wiping some installation clean off the map. The Reds have kept quiet as to the nature of the explosion and the exact place where it occurred." "The aliens followed _them_ all the way up to this time!"--Ross half rose from the chair--"But why? And why did they trail me?" "That we can only guess. But I don't believe that they were moved by any private vengeance for the looting of their derelict. There is some more imperative reason why they don't want us to find or use anything from one of their cargoes----" "But they were in power thousands of years ago. Maybe they and their worlds are gone now. Why should things we do today matter to them?" "Well, it does matter, and in some very important way. And we have to learn that reason." "How?" Ross looked down at his left hand, encased in a mitten of bandage under which he very gingerly tried to stretch a finger. Maybe he should have been eager to welcome another meeting with the ship people, but if he were truly honest, he had to admit that he did not. He glanced up, sure that Ashe had read all that hesitation and scorned him for it. But there was no sign that his discomfiture had been noticed.