Christopher investigates the murder of Wellington

Christopher’s investigation into Wellington’s murder is a self-appointed detective project that gives Christopher a structure for acting on uncertainty. It begins with a decision to find Wellington’s killer, proceeds through visits to neighbors and scrutiny of physical clues, and yields a plausible but mistaken suspect. Its answer arrives not through Christopher’s deductions but through Father’s confession, which overturns the investigation’s assumptions and makes the case inseparable from Christopher’s loss of trust.

A project on a Good Day

Christopher decides to investigate because it is a Good Day, which, by his system, is a day for projects and planning. When he tells Siobhan, she suggests that he write a story about finding Wellington’s killer and going to the police station. Christopher starts writing that account, making the investigation both something he undertakes and the subject of the narrative he is composing.

The decision is notable for its deliberate form: rather than treat Wellington’s death as a matter to leave alone, Christopher gives it a defined purpose and a sequence of tasks. His project begins in a world of rules and observable facts, where an inquiry seems more manageable than the unsettled human relationships around it. The reader follows the investigation through Christopher’s first-person account, sharing the limited conclusions available to him at each point.

Visits and physical clues

That evening Christopher goes to Mrs. Shears’s house and knocks. She opens the door with a mug of tea in hand, but, when he asks whether she knows who killed Wellington, she ends the conversation and closes the door. Christopher sees her through the frosted glass, waits until she is no longer in the hall, and then climbs over the wall into her back garden to inspect the toolshed.

The shed is secured with a padlock, so Christopher cannot enter. Looking through a side window, he sees a clean fork on a bench that resembles the fork found sticking out of Wellington. He also sees a spade, rake, and long-handled clippers with matching green plastic handles. The resemblance gives him a material link between Wellington’s killing and Mrs. Shears’s tools, but it does not establish who used the fork. Christopher considers whether Mrs. Shears herself killed Wellington, then reasons against the idea because she had come out shouting about what had happened to her dog. He concludes instead that the killer may have used her fork and that access to the locked shed, or to a fork left outside, would matter.

On the next day, a Saturday, Father stays home to watch England play Romania, so Christopher decides to question other people in the street. He knows that approaching strangers is not something he usually does, but the murder project leads him to ask whether anyone saw the killing or noticed anything strange on Thursday night. His inquiry thus moves from a physical clue to witness-gathering: the fork raises questions about access, while neighbors may supply observations he cannot obtain by looking at the shed alone.

Reasoning toward a suspect

After speaking with Mrs. Alexander, Christopher leaves her house and, while crossing the street, forms a chain of reasoning about why someone might kill a dog: hatred, madness, or a desire to upset Mrs. Shears. He does not know anyone who hated Wellington or anyone mad, so those possibilities seem to point toward a stranger. But he also relies on the general claim that murder is most likely to be committed by someone known to the victim. The third possibility, making Mrs. Shears unhappy, points him toward the one person he knows who disliked her: Roger Shears.

Christopher names Roger his prime suspect because Roger had been married to Mrs. Shears, knew Wellington, and had left her two years earlier. The suspicion is an inference, not a witnessed fact. Christopher has connected a possible motive to a person with prior access to Wellington, while the clean fork in the shed suggests a route by which the murder weapon might have been obtained. Neither clue proves Roger was responsible, but together they give Christopher a coherent working theory.

Christopher voices that theory to Father over dinner, saying that he thinks Roger probably killed Wellington and is his prime suspect. Father has already told him to keep out of other people’s business, and he says nothing in response at that moment. The exchange makes the investigation a source of conflict at home as well as a search outside it: Christopher treats naming his suspect as an important report, while Father’s silence offers no confirmation.

The investigation’s reversal

The case ultimately turns on information Christopher did not have when he was pursuing Roger. Later, Christopher finds an unopened envelope addressed to him beneath his book in a shirt box. The postmark shows that it was posted on 16 October 1997, eighteen months after Mother was supposed to have died. The discovery of Mother’s letters and the date on the envelope overturn his understanding of his family history; it also places his detective project within a wider sequence of concealed truths.

Father eventually tells Christopher that he can trust him and promises to tell the truth from then on. He then admits that he killed Wellington. In explaining the circumstances, Father recalls that Mrs. Shears had helped him after Mother left and that he had hoped their closeness might lead to her moving in with him, or to his moving into her house. The admission supplies the answer to the murder mystery, but it does not validate Christopher’s earlier theory about Roger: the person Christopher identified as his prime suspect was not the killer.

The revelation changes the meaning of the inquiry. Christopher’s observations and deductions have been careful, but the decisive fact was withheld by someone close to him. The investigation therefore resolves the question of who killed Wellington while creating a more immediate problem for Christopher: whether Father can be trusted after confessing both to the killing and to a profound deception.

From investigation to flight

After Father’s confession, Christopher leaves home and plans to reach Mother in London. His investigation has begun as a project on a Good Day, but its consequences are no longer confined to the original question of Wellington’s killer. Once the suspected danger comes from inside his own home, leaving becomes Christopher’s response to what he has learned.

During the later journey, Christopher encounters a police officer and says he is going to live with Mother. When he fears the officer will take him back to Father, he runs; the officer grabs him, Christopher screams, and the officer lets go. The episode echoes the earlier police contact that followed Wellington’s killing: questions and physical contact can overwhelm Christopher, while his understanding of police procedure does not ensure that he feels safe. His escape is an immediate consequence of the shattered trust that the investigation’s answer has exposed.

As a detective plot, the inquiry offers concrete clues—the fork, the locked shed, the relationships around Mrs. Shears—and a reasoned suspect. Its reversal depends on a fact concealed within the family rather than on a final deduction from those clues. The reader experiences that reversal through Christopher’s account, so the murder question and the question of whom he can trust are revealed together.