two loaded mules and herder walking on dangerous path in mountains, sketch, hand drawn linear

animal art backpack book caravan cargo carry cliff coloring countryside danger dangerous donkey doodle drawn gear goods hand herder high hiking himalaya himalayan himalayas horse illustration isolated line linear load loaded mammal man mountain mountains mule mules nature nepal nepalese nepali overwork pack path pathway sketch sketchbook sketchy step this track trail transport transportation trekking two type upland used vector walk walking widely