For a second there was conflict over control of the circuits to the disciplinary corps which carried with it command of the organism during the emergency. The speculative bank customarily assumed this responsibility, but a slight schism had developed between it and the interpretive bank. The latter's greater age and skill came into play and victory was quickly won. From the disciplinary corps came the order, "Stay close to the 'man'." The interpretive bank explained, "He breathes the air so he'll have to get to it some way." The defeated speculative bank maintained a sulky silence. Thus it was that the entire mind of the Rell rode into the interior of the ship through the airlock while clustered around Brown. The Rell had grasped that the man lived and traveled inside his ship and the necessity for it to be airtight. But so desperate were the two races' needs that the necessity for an airlock and the consequent slight seepage each time it was used had not occurred to even the interpretive bank. Inside, many Rell, suddenly intoxicated by the heady moisture-laden air, commenced uniting with each other then splitting away, each such union resulting in another unit of Rell, naturally. The interpretive bank again seized control. "Stop it! Stop it this instant!" it snapped. "Reproduction must be kept to the former minimum for now. That is a firm order." Reluctantly the process was halted. The interpretive bank explained, "It would not take long for us to use up the entire supply of water if we indulged in uncontrolled reproduction. That might endanger the whole trip." "What do we do now?" the speculative bank finally asked. "There is no way of knowing positively whether the man uses this same atmosphere until he returns to his world or not. For our own safety it would seem best, since Rell-like creatures already inhabit him, that we join them. If any place is safe it will be his interior. And there is plenty of moisture within to sustain us. But we must be good parasites," the interpretive bank warned. "Remember, no undue reproduction no matter how many quarts of moisture seem to be going to waste inside this 'man'. He may need it himself and if he does not survive the ship might not complete its trip." Brown was just emerging from his space suit so the Rell chose his closest available body opening and flowed as a group into his mouth and nostrils. "Ahchoo!" sneezed Brown, violently evicting half the Rell. They re-entered a bit more cautiously in order not to irritate the sensitive membrane again. "Dammit," said Brown, "don't tell me I've caught a cold clear out here on Mars. Hope I didn't pick up any Martian germs." But he needn't have worried. By the time he reached Earth he was far less germ-ridden, even if considerably more itchy on the exterior, than when he'd left. The Rell were good at self defense and a surprising number of mindless but voracious creatures in Brown's interior had been eliminated.