"Professor," he said meditatively, "you don't know it, but I've been thinking over things in the last few hours. And I've come to a decision. I'll tell you what I've been thinking, because I want you to understand just why I'm doing this." Delabar was silent, peering at him inquisitively. "Back on the steamer," resumed Gray, "you showed me that you had nerves--quite a few. Well, lots of men have 'em. Under the circumstances, I can't say I blame you. But at Honanfu your nerves had a severe jolt. Back there"--he jerked his head at Liangchowfu--"you had a bad case of fright. You're all in now." "I am hungry," complained the scientist. "Why did you tie me to the mule?" "That skirmish with Wu Fang Chien," continued the officer, ignoring the question, "wasn't more than a good sample of what we may have to face in the Gobi Desert. It showed me you aren't able to go ahead with the trip. You'd be as sick in body as you are now in mind." "I am not a horse," snapped Delabar. "The Buddhist priests----" "Precisely, the Buddhist priests. They've got you scared. Badly. Let me tell you some more I've been thinking. Intentionally or not, you have done all you could at Liangchowfu to hinder me. Only luck and Mirai Khan got us out of the place with a whole skin. In the army where I served for a while they shot men who became drunk when on duty." "This is China, another world," retorted the man moodily. "China or not, it's my duty to go to the Gobi Desert and find the Wusun if I can. I promised Van Schaick that, and drew up a contract which I signed. I'm going ahead. You, Professor, are going back to the coast and to the States. You can report our progress to Van Schaick." Mingled relief and alarm showed in the Syrian's keen face. "You can complain that I sent you back, if you want to. I'll answer to Van Schaick for this." Gray held up his hand as the other tried to speak. "You'll be all right. I've been quizzing Mirai Khan. The coolie can guide you back, to the north of Liangchowfu, where you'll meet some missionaries. Wu Fang Chien will be looking for us to the west, not in the east. You'll take the money you have on you, and two mules with half the supplies. Promise the coolie enough gold, and he'll stick by you--as he'll be safer going back than forward. Any questions?" It was a long speech for Gray to make. Delabar studied him and shivered in the cold breeze that swept the plain. Hardship brings out the strength and weakness of men. In his case it was weakness. Yet he seemed curiously alarmed at leaving Gray. Twelve hours ago he had implored his companion to give up the venture into the Gobi. "Why are you doing this?" he asked.