a follower or student of a teacher, leader, or philosopher.--that is the definition of a disciple and so Nora was Dr Croft's disciple. She was his student, his protege---a person who is guided and supported by an older and more experienced or influential person. I like that term much better. She was not pledged to him--what does that mean, anyway? I've never been pledged to any of my teachers nor were any of my students pledged to me. She knew no other teacher--she grew up from childhood knowing what he did as a professional. She, like any child, became interested in what he was doing and found she, too, was fascinated by the human body and its construction and function. Showing ability and interest, Dr Croft willingly took her under his tutelage. What teacher would ignore a willing and able pupil?? She certainly wasn't going to find another willing to foster her interest! If not Croft, then who?