From Roy Chapman Andrews' excellent book 'Across Mongolian Plains' published in 1921.
I think there is nothing which makes me feel more helpless than to be alone on the plains without a horse. For miles and miles there is only the rolling grassland or the wide sweep of desert, with never a house or tree to break the low horizon. It seems so futile to walk, your own legs carry you so slowly and such a pitifully short distance, in these vast spaces.
To be left alone in a small boat on the open sea is exactly similar. You feel so very, very small and you realize then what an insignificant part of nature you really are. I have felt it, too, amid vast mountains when I have been toiling up a peak which stretched thousands of feet above me with others rearing their majestic forms on every side. Then, nature seems almost alive and full of menace; something to be fought and conquered by brain and will.
Early in our work upon the plains we learned how easy it is to lose one's way. The vast sea of land seems absolutely flat, but in reality it is a gently rolling surface full of slopes and hollows, every one of which looks exactly like the others. But after a time we developed a land sense.
The Mongols all have it to an extraordinary degree. We could drop an antelope on the plain and leave it for an hour or more. With a quick glance about our lama would fix the place in his mind, and dash off on a chase which might carry us back and forth toward every point of the compass. When it was time to return, he would head his pony unerringly for that single spot on the plain and take us back as straight as the flight of an arrow.
At first it gave him unceasing enjoyment when we became completely lost, but in a very short time we learned to note the position of the sun, the character of the ground, and the direction of the wind. Then we began to have more confidence in ourselves. But only by years of training can one hope even to approximate the Mongols. They have been born and reared upon the plains, and have the inheritance of unknown generations whose very life depended upon their ability to come and go at will. To them, the hills, the sun, the grass, the sand – all have become the street signs of the desert.