sarah related eagerly ( as cori transferred the details to her notebook ) , she said that stella dunbar had been tutoring a lad last year , got him into an interview with an oxford college apparently , but that obviously hed since left town ; but this year there are only two girls who the teachers there knew about , and that they do match the initials you gave her : a stacie kehoe and an esther night ; both fourteen , in the same class , friends so their teachers believe ; and that the long-dark-haired one is definitely esther night .