Final answer:
The figurative language used in the sentence is a simile, comparing Rainsford's actions to those of a fox in a hunt.
Step-by-step explanation:
The figurative language used in the given sentence is simile. A simile is a type of figurative language that compares two things using the words 'like' or 'as'. In this case, Rainsford's actions are being compared to those of a fox by recalling the knowledge and tactics of a fox hunt. The comparison helps to emphasize Rainsford's cunning and resourcefulness as he tries to evade his pursuers.