References in classic literature ?
With a noiseless step he crossed the rock, and dropped into the troubled stream.
So interested was he in seeing her comfortably disposed that he failed to notice the little package that had worked from his pocket as he assisted in lowering the sling that contained the old woman over the steamer's side, nor did he notice it even as it slipped out entirely and dropped into the sea.
Then, having eaten, too, I lay down with my back to that of my faithful hound, and dropped into a deep and dreamless sleep.