Also, it seemed as if a prodigious enlargement of my brain was taking place within the skull itself that did not enlarge.

There were occasional glintings and flashings of light as if even I, the overlord, had ceased for a moment and the next moment was again myself, still the tenant of the fleshly tenement that I was making to die.
Most perplexing was the seeming enlargement of brain.

Without having passed through the wall of skull, nevertheless it seemed to me that the periphery of my brain was already outside my skull and still expanding.
Along with this was one of the most remarkable sensations or experiences that I have ever encountered.

Time and space, in so far as they were the stuff of my consciousness, underwent an enormous extension.

Thus, without opening my eyes to verify, I knew that the walls of my narrow cell had receded until it was like a vast audience-chamber.