It is impossible to reread Poul Anderson without finding some passage for quotation or comment. Here we find similar pathetic fallacies in two different periods of two different timelines:
"Night rolled out of the east, like a message from Soviet lands plunged into chaos and murder."
-Poul Anderson, "Marius" IN Anderson, The Psychotechnic League (New York, 1981), pp. 13-28 AT p. 14.
"The last thing he heard was thunder. It sounded like the hoofs of horses bearing westward the Hunnish midnight."
-Poul Anderson, "The Sorrow of Odin the Goth" IN Anderson, Time Patrol (Riverdale, NY, December 2010), pp. 333-465 AT 374, p. 465.
Night from the east. Usually, we think of the sun as coming from there:
"Out of the east, the morning behind them, rode the Anses into the world."
-Poul Anderson, "Star of the Sea" IN Time Patrol, pp. 467-640 AT II, p. 557.
"Above the cliffs, a few eastern clouds turned red."
-Poul Anderson, Mirkheim IN Anderson, Rise Of The Terran Empire (Riverdale, NY, March 2011), pp. 1-291 AT XXI, p. 291.
Light from the east, morning; but also sunset colours signifying the end of this novel and of an era.
Wisdom also comes from the east except for Chinese Buddhists whose wisdom came from India, the West! We have gone off the point here. Unless the point is the symbolism of directions - up, down, east, west.