meals. “The food that one eats is supposed to undergo certain chemical changes during the process of digestion and assimilation, the result, of course, being the rebuilding of wasted tissue. “Now we all know that mind is all, though we may differ in the interpretation of its various manifestations. Tario maintains that there is no such thing as substance, all being created from the substanceless matter of the brain. “We realists, however, know better. We know that mind has the power to maintain substance even though it may not be able to create substance—the latter is still an open question. And so we know that in order to maintain our physical bodies we must cause all our organs properly to function. “This we accomplish by materializing food-thoughts, and by partaking of the food thus created. We chew, we swallow, we digest. All our organs function precisely as if we had partaken of material food. And what is the result? What must be the result? The chemical changes take place through both direct and indirect suggestion, and we live and thrive.” Carthoris eyed the food before him. It seemed real enough. He lifted a morsel to his lips. There was substance indeed. And flavour as well. Yes, even his palate was deceived. Jav watched him, smiling, as he ate. “Is it not entirely satisfying?” he asked. “I must admit that it is,” replied Carthoris. “But tell me, how does Tario live, and the other etherealists who maintain that food is unnecessary?” Jav scratched his head. “That is a question we often discuss,” he replied. “It is the strongest evidence we have of the non-existence of the etherealists; but who may know other than Komal?” “Who is Komal?” asked Carthoris. “I heard your jeddak speak of him.” Jav bent low toward the ear of the Heliumite, looking fearfully about before he spoke. “Komal is the essence,” he whispered. “Even the etherealists admit that mind itself must have substance in order to transmit to imaginings the appearance of substance. For if there really was no such thing as substance it