Thousands of remote valleys in New Guinea—settled despite rugged barriers—attest explorers like those depicted in “A New Valley Beckons.” Over the ages, nearly naked tribal men braved icy chill by scaling grim crags in search of new village sites in valleys beyond. Clouds already forming on treeless cliffs forebode obscuring mist and bone-chilling rain by nightfall. Grass skirts and leafy rain-capes are no shield from hypothermia; so a swift descent below tree-line, where firewood abounds and rocky overhangs provide shelter, is essential for the pioneers’ survival.  Don depicts a part of New Guinea where lofty peaks fall precipitously to sea-level jungle with almost no foothills!