William K. Frilingsdorf, the well-knowii river pilot, was seriously injured yesterday in Louisville by being thrown from his buggy, lie was driving a fast young horse and his laprobe was about to fall from the buggy. He leaned over to recover it, when his horse shied at something on the street, causing the buggy to eollide with a grocery wagon which was passing. Mr. Frilingsdorf was thrown out and struck on his head, the wheels of his buggy passing over him. He sustained a fracture of lus left arm and several serious wounds about the head.