In January in Northern Russia, everything vanishes beneath a deep blanket of whiteness. Rivers, fields, trees, roads, and houses disappear, and the landscape becomes a white sea of mounds and hollows. On days when the sky is gray, it is hard to see where earth merges with air. On brilliant days when the sky is a rich blue, the sunlight is blinding, as if millions of diamonds were scattered on the snow, refracting light. In Catherine's time, the log roads of summer were covered with a smooth coating of snow and ice that enabled the sledges to glide smoothly at startling speeds; on some days, her procession covered a hundred miles.