Inner meaning of Chapter 1

In chapter 1 readers will begin the book with Lena Grove. Lena is from Mississippi but walked to Alabama on her own bare feet. Lena encounters a town in which her brother works and lives in. Overtime, Lena is invited to live with her brother and sister-in-law as she takes care of her brothers children. Subsequently, Lena also becomes pregnant by a man with the last name of Jake(?) Burch. As a result of Lena's pregnancy willingly leaves her brothers home into a world beyond her imagination. As Lena is on this journey she encounters a clash between isolation and disgust from fellow townspeople. As Lena lays in a ditch she is picked up by Mr. Armstid(a civilian of the town) and is invited to stay at the Armstids house for a night or two. As time inevitably passes by, Lena discovers that she is not alone and will receive help from others, as of Mrs. Armstid whom didn't approve of Lena but gave her money to catch a wagon(taxi). As Lena is dropped off at the bus stop by the generous Mr. Aristid she encounters with a man who tells her that her partner in adultery(if you call it that) that her baby's fathers last name is Bunch, not Burch. Lena acquires this information with great and utter confusion. Lena then catchs a wagon and she tells the driver of her situation and as the driver continues on his path he notices two plumes of smoke in which a house may have caught fire. What do you believe that plumes of smoke represented? Overall, Faulkner started off his book with mans humanity to man to portray the willingness in most people, but as the novel continues Joe Christmnas, main character will deal with mans inhumanity to man. Any thoughts on how Faulker will portray Joe's issues? Also, how does Lena symbolize Mary?