Marching Sands
"You forget," pointed out Delabar sharply, "the negative. It is the strongest kind of a warning. Do not, if you are wise, approach the western wall. My friend, this is a plain warning—even a threat. To-day Wu Fang Chien hinted we should not go to Liangchowfu. Now he threatens"
"I gathered as much." Gray took the slip of fine silk and scanned it quizzically. "Delabar, do you know the ideograph for 'to make' or 'build?'"
The scientist nodded.
"Then write it, where it seems to fit in here."
Delabar did so, with a glance at his companion. Whereupon the soldier folded the missive and replaced it in the jar. He clapped his hands loudly. Almost at once a boy appeared in the door.
To him Gray handed the vase with instructions to carry it to His Excellency, the official Wu Fang Chien. He reënforced his order with a piece of silver cash. To the curious scientist he explained briefly.
"Wu Fang is a scholar. He will read our reply as: A wise man will not build a wall in the west. It will give him food for thought, and it may keep His Excellency's men from overhauling our belongings a second time during our absence."
Delabar started. "May?"
"Yes. Remember I left that message of Wu's on top of these maps. I find it underneath them. The maps are all here. We locked our door, care-
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