In the third stanza there is a reference to Annabel Lee’s “high-born kinsmen,” which is a reference to her wealth.
In those days, it was not uncommon for even a wealthy person to succumb to illness even if the person had money. They simply did not have the technology to combat some of these illnesses, such as the respiratory illness that killed Annabel Lee.
In the second stanza, we fight out that Annabel Lee’s family had money.
A wind blew out of a cloud by night
Chilling my Annabel Lee;
So that her high-born kinsmen came
And bore her away from me…
The term “high-born kinsmen” suggests that at least Annabel’s ancestors and relatives had money. It is an interesting choice. Poe uses it to show that she was special. It is one of the many ways he sets her apart from others in the poem.