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 getting out of my depth. What I want to know is this: Why do you think that I can find this white tribe in Asia—the Wusuns? I'm an army officer, out of a job and looking for one. That's why I answered your letter. I'm broke, and I need work, but"

Van Schaick peered at a paper that he drew from a pile on his desk.

"We had good reasons for selecting you, Captain Gray," he said dryly. "You have done exploration work north of the Hudson Bay; you once stamped out dysentery in a Mindanao district; you have done unusual work for the Bureau of Navigation; on active service in France you led your company"

Gray looked up quickly. "So did a thousand other American officers," he broke in.

"Ah, but very few have had a father like yours," he smiled, tapping the paper gently. "Your father, Captain Gray, was once a missionary of the Methodists, in Western Shensi. You were with him, there, until you were four years of age. I understand that he mastered the dialect of the border, thoroughly, and you also picked it up, as a child. This is correct?"

"Yes."

"And your father, before he died in this country, persisted in refreshing, from time to time, your knowledge of the dialect."