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
In the fall of the year they penetrated a weird lake country, sad and silent, where wild fowl had been, but where then there was no life nor sign of life-only the blowing of chill winds, the forming of ice in sheltered places, and the melancholy rippling of waves on lonely beaches.
Explanation
Jack London repeats the "S" sound when he writes "sad and silent." This alliteration emphasizes the lonely, isolated atmosphere of the lake country.