That he had fallen into the hands of the Northerners he was well aware; but he was unable to imagine how this had happened.

He remembered that the Confederates had been, up to the moment he fell, completely successful, and he could only imagine that in a subsequent attack the Federals had turned the tables upon them.
How he himself had fallen, or what had happened to him, he had no idea.
Beyond a strange feeling of numbness in the head he was conscious of no injury, and he could only imagine that his horse had been shot under him, and that he must have fallen upon his head.

The thought that his favorite horse was killed afflicted him almost as much as his own capture.

As soon as his captors perceived that their prisoner's consciousness had returned they at once reported that an officer of Stuart's cavalry had been taken, and at daybreak next morning General McClellan, on rising, was acquainted with the fact, and Vincent was conducted to his tent.
"You are unwounded, sir," the general said in some surprise.
"I am, general," Vincent replied.

"I do not know how it happened, but I believe that my horse must have been shot under me, and that I must have been thrown and stunned; however, I remember nothing from the moment when I heard the word halt, just as we reached the side of the stream, to that when I found myself being carried here." "You belong to the cavalry ?" "Yes, sir." "Was Lee's force all engaged yesterday ?" "I do not know," Vincent said.