In Chapters Forty and Forty-one of Mark Twain's The Adventures of Huckleberry Finn, the boys (following one of Tom's "hare-brained" schemes) decide to help Jim escape his captivity. In the ruckus that ensues this "escape," Tom is shot in the calf of his leg. Forever acting out some novel or another, he dramatically tells Jim to run for it—and to leave Tom behind to fend for himself. Jim, however, absolutely refuses to leave Tom, showing that his love for the boys and their well-being is more important than even his own freedom.
So Huck leaves Jim and Tom on the raft and goes for a doctor. The doctor agrees to help, though he is suspicious, but he will only go out in the canoe by himself, believing it won't carry more than one person. Huck returns home and Aunt Sally eventually clears the house of all the visitors there because of the threatening letter and/or Jim's escape. She then tucks Huck in. He has plans to go to the raft to check on Tom, but Aunt Sally begs him not to leave.
Laws knows I wanted to go bad enough to see about Tom, and was all intending to go; but after that I wouldn't 'a' went, not for kingdoms.
Aunt Sally is already worried about Tom and doesn't want to "lose" the one boy that is home. She is so loving and kind to Huck that he doesn't have the heart to go. It is for this reason that Huck does not check out Tom's condition, while he is wounded and on the raft.