Why are these lines from act iv important in the plot of the play? ross to macduff. your castle is surpris'd; your wife and babes savagely slaughter'd: to relate the manner were, on the quarry of these murder'd deer, to add the death of you. the choices above given are actually the part of the play ross to macduff.   the lines talk about the lost of many, especially the women and children in their castle. the narrator would rather have himself be killed than to live.