the introduction has prepared the reader to understand that something significant occurs while the boy and girl are talking. what is it, and what does it mean

This section also introduces the Moors, who will recur throughout the novel. The merchant girl, of whom Santiago dreams, is remarkable for her "moorish" features. This foreshadows both Santiago's love for Fatima and the journey he will undertake to Africa, from whence the Moors came.

They were friends ?