how and why did antonia come to the city?

When the Harlings' cook leaves, Grandmother persuades Mrs. Harling to hire Ántonia. Mrs. Harling goes to visit the Shimerdas to get an impression of Ántonia and her family. Afterwards, Jim and the grandmother go hear what Mrs. Harling has to say. Mrs. Harling likes Ántonia and tells about how grumpy and demanding Ambrosch was. Ambrosch wanted all of Ántonia's wages to go directly to him, but Mrs. Harling mandates that a certain amount will be set aside for Ántonia's own use.