Only for Yellowstone Kelly can a lazy day at the bar turn into a race against time to recover a priceless skeletonCharles Darwins survey aboard the HMS Beagle forever changed natural history causing a flurry of wild speculation and exploration in the wake of every major find Yellowstone Kelly fresh off his misadventures in Kelly Blue is cooling his heels in a Wyoming saloon when he encounters a specimen hunter Pignuts the saloon owner had bartered whiskey for a strange threetoed horse skeleton and now displays the fossil proudly in his bar A coldeyed stranger comes in buys the bones for a handful of gold and introduces himself as paleontologist Jonathan Cope Cope recruits Kelly to be his guide through the Wyoming wilds The professor and his beautiful assistant Alys hope to find what the Sioux call Thunder Horsesenormous fossilized bones weathered out of the hills This trip like many other Kelly expeditions wont be an easy one Trailing the trio on their journey is Blue Fox a Dartmoutheducated Cheyenne madman who notoriously loathes professors of all stripes Along the way Kelly crosses paths with some of the most illustrious figures of the era as he helps his group navigate the many predicaments of the Old West