Only when Edmund's Hogwarts letter arrived did his father explain to him in detail everything that had happened. Edmund's mind was stretched thin by the story. It was that very evening that his mind began to travel to wherever Rosemary was in time. Though he did not share her blood, he often thought of her.
Turning over the story his father had told him, Edmund became close to obsessed with the time-warp. When he was allowed to, he searched the library shelves for any and every book that he could get his hands on concerning the event and he plotted down notes and facts in a personal journal. He even took to asking the professors about the event when they weren't occupied with the goings on of the school, trying to understand the complexities of the event. Edmund's friends grew a bit concerned with the obsession, with one of his housemates telling him to stop obsessing over a woman who he wasn't actually related to.
Edmund returned to Hogwarts for his second year (the 1959-1960 term) and there wasn't much of considerable note to distract Edmund from his research. Knowing that Edmund would be using the wealth of knowledge at the school to uncover details, Bennett sent owls twice a week warning his son not to. These owls were contrasted with owls from Casandra who, for the first time, openly encouraged Edmund's curiosity about the woman who first held his father's heart and had mothered his sister.