Alliteration

a figure of speech in which the same sound appears at the beginning of two or more words. Alliterative words are consecutive or close to each other in the text.

Example From Text

He even went out of his way to bully Buck, striving constantly to start the fight which could end only in the death of one or the other.

Explanation

Here, London again repeats the "T" sound in the phrase "toiled in the traces" to emphasize Buck's exhausting work.