Why does mama ask papa, "you got my letter?" and say "...we're glad to have you here (Mr. Morrison)...espeically now." what is probably written in the letter?

Papa is working far away for the railroad in order to pay the mortgage for the farm. He sends the big and powerful Mr. Morrison to take care of his family. Mama is glad to have him around. He works on the farm and they feel safe with him. The family is also feeling threatened by certain whites that want their land as well as Mama taking a stand against the Wallace store.