About a hundred yards away from the dam a rope with cork floats barred the pleasure boats from coming any closer.

距离大坝大约一百码处， 一根带软木浮筒的绳索阻止游船靠近。

The lower end of each line dragged the bottom by means of a small grappling iron, and at the surface it was secured to the buoy-rope of a cork float.

每条线的一头都拖着小钩，用固定在软木浮标上的浮标索拉在水面上。