Two of the whipmasters saw Ca'daan and the Kal lying along the dying horse.
Ca'daan and Kal were spotted lying along the dying horse by two of the whipmasters. 
mnli hypothesis: Ca'daan and Kal were spotted lying along the dying horse by two of the whipmasters.  premise: Two of the whipmasters saw Ca'daan and the Kal lying along the dying horse.