Answer and Explanation:
Twain avoided "literary offenses" by not mentioning these works throughout the narrative. This was significant because Twain keeps his attention on the narrative itself, specifically stimulating the themes that the narrative addresses.
In this case, instead of provoking criticism to other known works and authors, Twain highlights a narrative with themes that provoke reflections on regional differences and stereotypes, a sense of community and personal integrity.
He was used to being made fun of.
We know this by him taking this reply in ‘with a sort of humble patience’. This means that he has experienced this kind of teasing - or even bullying before and he is used to it.
