He wiped a sweaty forearm across a sweatier brow, then held his arm there to shade his eyes as he looked at the sky. No wonder the old man was exasperated. The sun was low in the sky, and Sam had not managed to keep the dance going for more than half an hour. The history chips said that the Ghost Dancers had performed their ritual for days on end, fresh dancers taking the place of the exhausted, without ever a break in the pattern. The power Sam needed to help Janice wouldn’t require that level of performance, but Sam knew he was still not going strong enough or long enough.