R. M. Ballantyne 
Twice Bought 

Excerpt: "How long Tolly Trevor remained in a state of horrified surprise no one can tell, for he was incapable of observation at the time, besides being alone. On returning to consciousness he found himself galloping towards the exploded fortress at full speed, and did not draw rein till he approached the bank of the rivulet. Reflecting that a thoroughbred hunter could not clear the stream, even in daylight, he tried to pull up, but his horse refused. It had run away with him."