Mark Twain was fond of using consonance and assonance as a literary device. Consonance and assonance begin on the first page and in the first phrase, which holds both consonance and assonance.
You don't know about me without you
First, there is an instance of consonance related to t, in the words don't about and without. This is followed by assonance with the ou diphthong in you about without and you again.
Another two instances of t consonance are:
took it and put it out at interest, and it fetched;
couldn't stand it no longer I lit out. I got into
Also, there is a prominent L consonance in the form of word-beginning alliteration in the early pages that I'm sure you can find.
Another instance of assonance is: budge it was all shriveled up.
Additionally, there is a prominent assonance sequence with the letter o having to do with a clock, also in the early pages, that I'm sure you can find.
Consonance is the repetition of a consonant following various groups of vowels: e.g., dog, bag, blog, big, wig, wag, etc.
Alliteration is a form of consonance that is the repetition of a consonant at the beginning of a word: e.g., big, bag, boy, blow, beam, beach, bang, bean, etc.
Assonance is the repetition of vowel sounds or similar vowel sounds in nearby words: e.g., hag, salve, maverick, laugh, etc.
Below are links to an eNotes definition and to university literary glossaries and lexicons.