This episode is a blip on an otherwise brilliant season. It requires too great a suspension of disbelief that a 200 year old corpse of a French compatriot of Napoleon is found perfectly preserved in a block of ice, along with a diary in pristine condition.
The story thread about Holling's ancestry was another uncomfortable lapse in judgement. Don't get me wrong: John Cullum is an amazing, talented, award-winning actor. But it's hard to buy into a guy with a Tennessee accent being from French Quebec. Just when you forget it and lay it aside, they shove this French ancestry story line in your face.
Not a horrible episode, but not on my favorites list.