It must be remembered that the description I have just given of the Swift One is not the description that would have been given by Big-Tooth, my other self of my dreams, my prehistoric ancestor.

It is by the medium of my dreams that I, the modern man, look through the eyes of Big-Tooth and see.
And so it is with much that I narrate of the events of that far-off time.

There is a duality about my impressions that is too confusing to inflict upon my readers.

I shall merely pause here in my narrative to indicate this duality, this perplexing mixing of personality.

It is I, the modern, who look back across the centuries and weigh and analyze the emotions and motives of Big-Tooth, my other self.