Incidentally, I have forgotten the most important thing of all. Remember that Donovan’s dominating idea was to prove to me, and to the world, that he had been in the Cretaceous and hobnobbed with its flora and fauna. He was a physicist by inclination, and had the physicist’s flair for ingenious proofs. Before leaving, he loaded a lead cube with three quartz quills of pure radium chloride that he had been using in a previous experiment, and locked the whole thing up in a steel box.

It’s another form of the space-time field that I use in the Egg to bridge the gap between the coils of time.

I knew grandfather. He would go as far as his machine could take him. I had duplicated that. He would look around him for a promising site, get out his tools, and pitch in. Well, I could do that, too.