He smirked good-naturedly. "All right," he chuckled. "You can't get back to any control hoods, our former human-size selves. I've tried. So our whole identities must have been transferred to these far smaller forms. Somewhere in our adventures the structure of each of our brains must have been exhaustively charted, down to the finest wavering of cell-filament, and the least variation of chemical state. Thus must have been captured every phase of our minds, memories, and personalities. This might have been done by something analagous to our focused radar or X-ray photography, penetrating deep, and making an instant record. From this record, the pattern of our brains must have been rebuilt, with all the complex channels of association and so forth, but in a totally different medium, capable of a far finer and more compact flow of energy than mere nerve impulses. In a brain of protoplast, I think it could happen." "Loose ends still dangle," I chuckled. "For instance, I remember a machine called George, and a statement by him that consciousness, awareness of self, was even difficult to define. How about transferring that?" Doc Lanvin shrugged. "Maybe the consciousness--the true self--is inherent in the brain channels, like the memory, and would also be transferred simply by copying them precisely," he said. "Or could the awareness be a kind of spark, capable of being captured and transported by an appropriate apparatus, as an electric spark can be captured in an electroscope? I don't know, Charlie. But I noticed some of the equipment carried by these Xians when they took us; and I thought of that." Silence seemed to close in as Doc finished; and it grew heavy with monumental implications, almost apart from mentioned things. I breathed, which suggested that my present form was getting energy in the familiar way--by the combustion of food substances. But as I held my breath for a prolonged moment, there was only a brief flutter, as of a heart quickening its beat inside me. I wondered eerily if this was evidence of a casual change-over, as if my android flesh could so quickly convert to some other energy supply, perhaps that of radioactive salts naturally in its substance. Such minerals were fairly common on the Jovian moons, and far commoner among the asteroids. I was compelled to breath again to speak.