to happen anyway. i showed it could be done. so there's a guilt in that. i don't think i can feel really responsible for what — the dreadful things that have happened in brazil, but i do feel guilty about it. and we were meeting tribes, some of whom had... they weren't first contacts, but they'd had very little contact with anybody else. they were virtually uncontacted people. and the result of contact of that sort has always been catastrophic, and disastrous for those people. and that's why we started survival international. did you think that, as a young man, did you think at the time that you were putting these people at risk? as you say, very little contact with any human beings outside their own societies before you came along with yourjeep, you could have transmitted diseases to them. absolutely. and one has to be very careful nowadays to take the right precautions. we didn't know about that in those days. that was new. so, yes, ifeel guilty about that. and at the same time, it was a very extraordinary experience to see those things and meet those people and start worrying about their future. and in fact, the friend i crossed the continent with, richard mason, was, on a subsequent expedition, killed by an uncontacted tribe, who weren't supposed to be in the area, but they were doing all the right things.