major characters were of
..DR. ALEXANDER GRAHAMBELL.
..MISS ANNE SULLIVAN.
major events wet like..
Helen's joining Cambridge school for preparation for Radcliffe enterance exams..
Mr. Gilman's sympathy understood.
...withdrawal of Helen and her sister from Cambridge school by her mom.
...the problems faced by Helen in Cambridge school in beginning.
there were many other ones but these are most important ones.