I wondered about the locket, too. there was no reference to the surgeon or the 'midwife' taking anything from olivers mothers body, although there was a point where the old lady leaned over body.
Yes, olivers face isinteresting, isn't it? rememberthe undertaker decided he would look good as a professional mourner although the first time i read the word to describe that position I thought they Dickens was referring to a person who might lay in the coffin and act dead to show off the look of the coffins when people came in, like a model!
Dickens goes to lengths describing Olivers angelic face, more than once, mybe implying that beauty brings about goodness?