Astounding Stories of Super-Science, August 1930

She took the seat in which Dalis had sat before he had gone out to the command of his Gens, studied for many minutes the battle in space between the two alien worlds. "Dalis is winning," said the Elder Sarka quietly, "apparently!" "The qualification is a just one," said Jaska softly. "'Apparently,' indeed! You will note now that, though men of the Gens of Dalis swarm all about the aircars, and even clamber atop them, no more are dying in the grasp of those tentacles? Is Dalis arranging a treacherous truce with the Moon-men?" "I have been wondering about that," said Sarka softly, "for it is my belief that nothing not conducive to his own selfish interests would have forced Dalis to leave this place and take command of his Gens, as I had first ordered, unless he had schemes planned of which father and I could know nothing. Now that I think of it, Jaska, how did Dalis know our secret code of fingers?" Jaska started, and turned a blanched face to Sarka. "Did he know?" she cried. "Did he? If he did that proves a suspicion that I have entertained since the first moment when Dalis swept into the fight, and I sensed that alien signals were being flashed back and forth!" "Flashed back and forth!" ejaculated Sarka. "How do you mean? That Dalis was somehow able to communicate with the Moon-men in their own language, or through their own signals?" "Why not? He knew our secret code, did he not? I never gave it to him, and I know that you did not. No, Dalis has some means, never discovered or suspected by you Sarkas, whereby he is able to understand alien tongues and alien sign manuals!"