Sundered from us by gulfs of time and stranger dimensions dreams the ancient world of Nehwon with its towers and skulls and jewels, its swords and sorceries. Nehwon's known realms crowd about the Inner Sea: northward the green-forested fierce Land of the Eight Cities, eastward the steppe-dwelling Mingol horsemen and the desert where caravans creep from the rich Eastern Lands and the River Tilth. But southward, linked to the desert only by the Sinking Land and further warded by the Great Dike and the Mountains of Hunger, are the rich grain fields and walled cities of Lankhmar, eldest and chiefest of Nehwon's lands. Dominating the Land of Lankhmar and crouching at the silty mouth of the River Hlal in a secure corner between the grain fields, the Great Salt Marsh, and the Inner Sea is the massive-walled and mazy-alleyed metropolis of Lankhmar, thick with thieves and shaven priests, lean-framed magicians and fat-bellied merchants—Lankhmar the Imperishable, the City of the Black Toga.
In Lankhmar on one murky night, if we can believe the runic books of Sheelba of the Eyeless Face, there met for the first time those two dubious heroes and whimsical scoundrels, Fafhrd and the Gray Mouser. Fafhrd's origins were easy to perceive in his near seven-foot height and limber-looking ranginess, his hammered ornaments and huge longsword: he was clearly a barbarian from the Cold Waste north even of the Eight Cities and the Trollstep Mountains. The Mouser's antecedents were more cryptic and hardly to be deduced from his childlike stature, gray garb, mouseskin hood shadowing flat swart face, and deceptively dainty rapier; but somewhere about him was the suggestion of cities and the south, the dark streets and also the sun-drenched spaces. As the twain eyed each other challengingly through the murky fog lit indirectly by distant torches, they were already dimly aware that they were two long-sundered, matching fragments of a greater hero and that each had found a comrade who would outlast a thousand quests and a lifetime—or a hundred lifetimes—of adventuring.
No one at that moment could have guessed that the Gray Mouser was once named Mouse, or that Fafhrd had recently been a youth whose voice was by training high-pitched, who wore white furs only, and who still slept in his mother's tent although he was eighteen.