Mr. White doubts that the monkey's paw can really grant wishes.
The answer is: Lines and stanzas
Friendship. In the novel, Huck and Jim are showing friendship by always defending one another. Huck made sure to find where Jim is and even gives away his 10¢ to get some information on where he was taken.
Consult a doctor after two(I'm guessing "to" was supposed to be "two") days of fever.