Would you be kind enough to explain to me the conspicuous presence of redundant words in the following sentence?
Both he and coachman agreed on this point, and so did her father and mother, and so did every one of the servants in the house, as they stood bobbing, and curtsying, and smiling, in the hall to welcome their young mistress.
A 'bobbed curtsy' is minimal. My sister, in the late '50s, went to a school where she was required to bob a curtsy whenever she passed a teacher in the corridor. It involved a slight inclination of the head and a slight bending of the knees.
A curtsy can be deep: a ballerina does one to acknowledge applause. See more examples here: curtsy - Google Search