The second group of roamers began to report back, and I examined the scans as they came in. The asteroids, it turned out, were being chivvied by a low-intensity, wide-field SURGE drive. The design ensured that the entire asteroid could be accelerated as a unit, without tidal forces or field drop-off tearing the body apart. It was an ingenious system, and I took copious scans for transmission to Bill. If he hadn’t already started moving Kuiper bodies toward Ragnarök, these designs would be very helpful.