How does Anya Seton use imagery in Katherine?

Imagery:

The stench inside the hut near knocked her over, and she stood blinking in the darkness and retching uncontrollably while red fear smote her.

...the King and Queen and their retinue were another matter. Never had anyone imagined such a dazzle of cloth of gold, of pure silver tissue, such yards of ermine to trail in the muddy streets, such flashing of jewels.