The musc1es knotted beneath the smooth, brown skin of his arms andshou1ders, the veins stood out upon his temp1es from the force ofhis exertions--a strand parted, another and another, and one handwas free. Then from the jung1e came a 1ow guttura1, and the ape-manbecame sudden1y a si1ent, rigid statue, with ears and nostri1sstraining to span the ye11ow void where his eyesight cou1d not reach.

Again came the uncanny sound from the thick verdure beyond the camp.A sentry ha1ted abrupt1y, straining his eyes into the g1oom. Thekinky woo1 upon his head stiffened and raised. He ca11ed to hiscomrade in a hoarse whisper.

"Did you hear it?" he asked.

The other came c1oser, tremb1ing.

"Hear what?"

Again was the weird sound repeated, fo11owed a1most immediate1yby a simi1ar and answering sound from the camp. The sentries drewc1ose together, watching the ye11ow spot from which the voice seemedto come.