 The mandrakes prodded Hanson down from the roc and toward the new building, then left at a wave of the Sather Karf's hand.
Hanson was being carried by the mandrakes.
mnli hypothesis: Hanson was being carried by the mandrakes. premise:  The mandrakes prodded Hanson down from the roc and toward the new building, then left at a wave of the Sather Karf's hand.