16 SING SPEAKS For a week Professor Maxon with von Horn and Sing sought for Virginia. They could get no help from the natives of the long-house, who feared the vengeance of Muda Saffir should he learn that they had aided the white men upon his trail. And always as the three hunted through the jungle and up and down the river there lurked ever near a handful of the men of the tribe of the two whom von Horn had murdered, waiting for the chance that would give them revenge and the heads of the three they followed. They feared the guns of the white men too much to venture an open attack, and at night the quarry never abated their watchfulness, so that days dragged on, and still the three continued their hopeless quest unconscious of the relentless foe that dogged their footsteps. Von Horn w