# Dr. Trevor Markfield — The Case with Nine Solutions character guide > Dr. Trevor Markfield in The Case with Nine Solutions by J. J. Connington. **Role:** major **Also known as:** Trevor, Markfield, Dr. Markfield **First appearance:** 0000-i-the-dying-man ## Snapshot A sharp-tongued research chemist who helps the police with poison analysis while keeping his own cards close to his chest. ## Who they are Markfield moves easily between the laboratory, the Institute, and the Silverdales' social orbit, which makes him useful to the investigation and hard to read. He is caustic about marriage and women, and his reluctance to answer questions frankly puts Flamborough on edge. His scientific expertise and his private knowledge of the Silverdale household make him a pivot the police cannot afford to alienate. ## Relationships ### [Inspector Flamborough](https://www.betterreads.dev/discover/the_case_with_nine_solutions_se/characters/inspector_flamborough) _professional_ Dr. Trevor Markfield assists Flamborough with medical or forensic expertise, forming a cooperative professional bond. ### [Sir Clinton Driffield](https://www.betterreads.dev/discover/the_case_with_nine_solutions_se/characters/sir_clinton_driffield) _friendship_ Markfield and Driffield share a mutual respect and friendly rapport, often discussing the case as equals. ### [Silverdale](https://www.betterreads.dev/discover/the_case_with_nine_solutions_se/characters/silverdale) _professional_ Markfield and Silverdale interact in a clinical or investigative context, with Markfield possibly treating or examining Silverdale. ### [Dr. Ringwood](https://www.betterreads.dev/discover/the_case_with_nine_solutions_se/characters/dr_ringwood) _friendship_ The two doctors share a collegial friendship, often discussing medical matters and the case together. ### [Silverdale](https://www.betterreads.dev/discover/the_case_with_nine_solutions_se/characters/silverdale) _professional_ Markfield and Silverdale interact in a clinical or investigative context, with Markfield possibly treating or examining Silverdale. ### [Inspector Flamborough](https://www.betterreads.dev/discover/the_case_with_nine_solutions_se/characters/inspector_flamborough) _professional_ Dr. Trevor Markfield assists Flamborough with medical or forensic expertise, forming a cooperative professional bond. ### [Sir Clinton Driffield](https://www.betterreads.dev/discover/the_case_with_nine_solutions_se/characters/sir_clinton_driffield) _friendship_ Markfield and Driffield share a mutual respect and friendly rapport, often discussing the case as equals. ### [Sir Clinton Driffield](https://www.betterreads.dev/discover/the_case_with_nine_solutions_se/characters/sir_clinton_driffield) _friendship_ Markfield and Driffield share a mutual respect and friendly rapport, often discussing the case as equals. ### [Inspector Flamborough](https://www.betterreads.dev/discover/the_case_with_nine_solutions_se/characters/inspector_flamborough) _professional_ Dr. Trevor Markfield assists Flamborough with medical or forensic expertise, forming a cooperative professional bond. ### [Dr. Ringwood](https://www.betterreads.dev/discover/the_case_with_nine_solutions_se/characters/dr_ringwood) _friendship_ The two doctors share a collegial friendship, often discussing medical matters and the case together. ### [Dr. Ringwood](https://www.betterreads.dev/discover/the_case_with_nine_solutions_se/characters/dr_ringwood) _friendship_ The two doctors share a collegial friendship, often discussing medical matters and the case together. ### [Silverdale](https://www.betterreads.dev/discover/the_case_with_nine_solutions_se/characters/silverdale) _professional_ Markfield and Silverdale interact in a clinical or investigative context, with Markfield possibly treating or examining Silverdale. ## In the story ### [I: The Dying Man](https://www.betterreads.dev/discover/the_case_with_nine_solutions_se/chapters/i-the-dying-man) A visitor who shares gossip about Hassendean and Mrs. Silverdale, hinting at a scandal. ### [VII: The Fly in the Amber](https://www.betterreads.dev/discover/the_case_with_nine_solutions_se/chapters/vii-the-fly-in-the-amber) Initially surprised by the visit, agrees to assist with poison analysis, but becomes evasive when the cigarette-holder is shown; reveals he saw Dr. Silverdale with Avice Deepcar. ### [X: Information Received](https://www.betterreads.dev/discover/the_case_with_nine_solutions_se/chapters/x-information-received) Confirms the poison as hyoscine, shows the chemical store, and reveals his car number GX.9074 was involved in a fog incident. ### [XIII: The Murder of the Informer](https://www.betterreads.dev/discover/the_case_with_nine_solutions_se/chapters/xiii-the-murder-of-the-informer) Mentioned as a possible male witness for Silverdale; Flamborough distrusts his cooperation. ### [XIV: The Jacket](https://www.betterreads.dev/discover/the_case_with_nine_solutions_se/chapters/xiv-the-jacket) Questioned by Flamborough about the torn cloth and button; initially evasive but later cooperates; interjects to suggest someone might have borrowed Silverdale's coat. ### [Mr. Justice](https://www.betterreads.dev/discover/the_case_with_nine_solutions_se/chapters/xvii-mr-justice) The chemist and murderer, confronted at home; admits to the killings but tries to plead self-defense for the bungalow murder. ### [XVIII: The Connecting Thread](https://www.betterreads.dev/discover/the_case_with_nine_solutions_se/chapters/xviii-the-connecting-thread) Confesses to the murder of Yvonne Silverdale, the affair, and the framing of Silverdale; triggers an explosion after signing his statement. ### [Excerpts from Sir Clinton’s Notebook](https://www.betterreads.dev/discover/the_case_with_nine_solutions_se/chapters/xix-excerpts-from-sir-clinton-s-notebook) Prime suspect; his movements, access to hyoscine, and possible guilt in the Heatherfield burglary and murders are detailed. ## Links - HTML: https://www.betterreads.dev/discover/the_case_with_nine_solutions_se/characters/dr_trevor_markfield - Book: https://www.betterreads.dev/discover/the_case_with_nine_solutions_se - All characters: https://www.betterreads.dev/discover/the_case_with_nine_solutions_se/characters