"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."
"Yes."
Van Schaick laid down the paper.
"In short, Captain Gray," he concluded, "you have a record at Washington of always getting what you go after, whether it is information or men. That can be said about many explorers, perhaps; but in your case the results are on paper. You have never failed. That is why we want you. Because, if you don't find the Wusun, we will then know they are not to be found."
"I don't think they can be found."
The scientist peered at his visitor curiously.