He got only a hasty glimpse of gears that seemed to be back on their tracks before Sather Karf was beside him, driving the cranks with desperate speed.
Sather Karf worked on the cranks rapidly.
mnli hypothesis: Sather Karf worked on the cranks rapidly. premise: He got only a hasty glimpse of gears that seemed to be back on their tracks before Sather Karf was beside him, driving the cranks with desperate speed.