"These people are not explorers. They know little about their own world. And only a fraction--a very small fraction of the globe's surface seems habitable. Much of it is fluid--not water, not air--you shall see! The vast fluid areas, I have marked so on the map. And there are areas of tumbled, jagged mountains of metal--naked metal. And metal plains, smooth and barren as glass. "The country of the Garlands I have plainly marked. As you descend, you will have no difficulty in recognizing the globe's larger fluid areas, the larger configurations--and thus in locating, as you come closer, our little land. It is very small--on earth we would call it some three hundred miles, roughly oval. "We are only a million and a half people here--we of the Garlands. The Brauns are scarce a hundred thousand. I have marked their one city on the map, where it lies at the northern edge of our domain, with the equatorial mountains and the fluid lake of Tyre and the Tyre plain near it. "Beware this region, Frederick! Come up from the south! I suggest now that you head for our south pole. If you have made the voyage in my calculated time, you will find Pyrena ascending from her southern swing. She rotates in retrograde, Frederick, this moon of ours--at an average distance of eighty-nine thousand miles. "Head for the south pole, within Pyrena's orbital distance. Then come up toward the equator, between our moon and Xenephrene. If you are on time, you will find our moon at the full. "As you descend, you will go into Xenephrene's shadow, with her between you and the sun. It is what I desire--there will be less chance then of your being seen. In the area of our night, with Pyrena shining full upon you, descend into our atmosphere. You will find it extends outward some four hundred miles. Take it very slowly, Frederick--be careful of the heat of your descent through it--judge nothing from now on by earthly standards! Remember that! "You should be about over our ten degrees south latitude when you descend into the atmosphere. Keep between us and Pyrena--and come north to eight degrees S. "You will be in the night, with Xenephrene rotating under you as you hover. Your altitude now should be about forty miles. If the clouds bother you, descend to keep under them. If the night is too overcast, so that from beneath the clouds Pyrena is lost to you, and the darkness is too great for you to see our surface readily--wait until it clears. Take no chances! Haste of that sort is too dangerous! Let Xenephrene rotate for another day and night. I will see the weather and understand.