Sentence:  Then she took off the hank and looked me straight in the face, and very pleasant, and says: / “Come, now, what′s your real name? / “Wh &mdash; what, <WSD>mum</WSD>?” / “What′s your real name? Is it Bill, or Tom, or Bob? &mdash; Or what is it?” 
Meaning of the word marked with <WSD> tags:  ma'am; a term of respect for an older woman.