The Great Trouble: A Mystery of London, the Blue Death, and a Boy Called Eel (2013) is a middle grade historical fiction novel by American author Deborah Hopkinson. Hopkinson is a prolific writer of books for young readers and has published over 70 books, including biographies, picture books, middle grade historical fiction, and long-form nonfiction. The Great Trouble explores themes of class disparity and scientific inquiry and is set against the background of the 1854 cholera epidemic in London.

This guide is based on the 2013 Knopf/Borzoi Books e-book edition.

Content Warning: Both the source text and this guide describe the illness and death of adults, children, and babies. Descriptions of poverty and starvation are also featured, as well as the physical and emotional abuse of a child by a parental figure.

Plot Summary

The novel is narrated by Eel, a 13-year-old orphan in Victorian London. The story begins on the morning of what will come to be known as “the Great Trouble” (10). Eel is a “mudlark” who scours the banks of the River Thames for things to sell. Today, he learns that his stepfather, Fisheye Bill Tyler, is looking for him. As Eel journeys to his other job, he passes a mudlark named Nasty Ned, who is throwing a cat into the Thames. Eel rescues the cat, names her Queenie, and takes her to his lodgings at the Lion Brewery. On the way, he encounters a woman named Mrs. Lewis, whose baby, Fanny, is sick. He also meets his friend, Florrie Baker, who praises Eel’s industriousness and comments that he is mysterious about his earnings.

Abel Cooper, the foreman at the Lion Brewery, complains that the heat and “bad air” will cause illness. Eel is summoned to see one of the Lion’s owners, Mr. John, who accuses him of stealing. Though Eel knows that John’s nephew, Hugzie, is really the thief, he is more concerned about losing the four shillings that he has saved thus far. (It is later revealed that he needs this money to pay the weekly rent for his little brother Henry to stay at a boardinghouse). Eel rushes to see a local tailor named Mr. Griggs, whom he believes will vouch for his character.

When he arrives at Mr. Grigg’s house, however, he realizes that something is amiss. Upstairs, Mr. Griggs has been stricken by cholera. Eel takes the two Griggs children, Bernie and Betsy, with him to Dr. Snow’s house, hoping that the doctor will defend him against Mr. John. Florrie accompanies them. Once Eel reaches Dr. Snow’s upper-class neighborhood, however, he realizes that a gentleman has no reason to defend the character of a mudlark. He returns to the Thames, feeling defeated, and searches for things to sell even as he fears being spotted by his stepfather, Fisheye Bill.

The next morning, he visits the boardinghouse of a stern woman named Mrs. Miggle, with whom his younger brother Henry lives. To Eel’s relief, Mrs. Miggle offers to accept reduced rent for the week if Eel makes up the debt the next week. Eel realizes that it is his birthday. He returns to Mr. Griggs’s house in Golden Square and encounters Reverend Whitehead, the local junior curate. When Mr. Griggs dies, the reverend and Eel try to comfort the Griggs family. On Broad Street, people start to flee the outbreak. Eel spends the day earning pennies to help people load carts as they depart.

The next day, Eel has a narrow escape from Fisheye Bill, then returns to Broad Street to help the “coffin man” load the bodies of those struck down by cholera. Mrs. Griggs and Bernie have both fallen ill, and Florrie is nursing them. Worried for his friends, Eel returns to Dr. Snow to report the epidemic, but he does not get to see the doctor until the next morning. Although he hopes that Dr. Snow will help Bernie, Dr. Snow says it is too late to do so. Instead, Dr. Snow urges him to help track the epidemic’s source to prevent more people from falling ill. Dr. Snow believes that the source of cholera is water, not bad air. Eel is upset and angry, especially when Bernie dies, but he agrees to help Dr. Snow. The doctor also offers to pay Eel enough money to cover the debt to Mrs. Miggle.

Eel visits Henry and pays Mrs. Miggle. He warns his brother to look out for Fisheye Bill, then returns to Dr. Snow’s residence. Dr. Snow tasks Eel with making a map of the Broad Street area and noting all the water pumps. His goal is to prove that the outbreak originates around the Broad Street water pump, thereby proving to the governors that blocking public access to the pump is the best way to stop the epidemic. Florrie helps Eel to complete the map. The following day, Eel and Snow go to the General Register Office to obtain a list of the dead. Dr. Snow coaches Eel on the proper questions to ask in order to identify the epidemic’s source, which he believes to be the Broad Street water pump. They determine that the afflicted have all come into contact with Broad Street water, but they cannot prove that the disease didn’t come from another source until Eel learns of a woman in Hampstead who died of cholera. Meanwhile, Florrie falls ill with the disease.

Eel travels to Hampstead and then to Islington, where he confirms that the only people in that area who contracted cholera did so after drinking water from Broad Street. While he returns to report this discovery, Fisheye Bill kidnaps him. Fisheye wants to turn Henry into a beggar and a thief; he believes that Henry’s innocent good looks will help him to get more money. Fisheye beats Eel, but the boy does not reveal his brother’s whereabouts. Eel tries to concoct an escape plan and feels hopeful when Nasty Ned arrives at the door, but he soon learns that Ned is the one who told Fisheye where to find him. Fortunately, Ned’s guilty conscience gets the best of him, and he reports Eel’s whereabouts to another mudlark and friend of Eel’s, Thumbless Jake, who returns the following day to rescue Eel.

With less than an hour left before the Governors’ meeting to discuss the outbreak, Eel worries that he won’t be able to cross London in time to deliver the evidence that will ensure that the Broad Street water pump handle is removed. Fortunately, he encounters Betsy Griggs, who has now been adopted by her aunt. They ride together to the meeting, where Eel delivers an impassioned speech that convinces the governors to approve the plan to remove the handle. He later reports all this to Florrie, who is ill but recovering.

When Eel goes to see the handle removed, he sees Mr. Edward, the other owner of the Lion. Mr. Edward wishes that Eel had defended himself against the accusation of theft. Mr. Edward offers to help Eel, but he cannot guarantee if he will be able to reinstate Eel in his position at the Lion. As the following week progresses, the epidemic slows, and Eel realizes that he knows someone who got sick before Mr. Griggs: Fanny Lewis. They learn that Fanny was the “index case,” for the cesspool below her house was leaking into the Broad Street water supply. Mr. Edward offers to adopt Henry and Eel and send them both to school.

One year later, the cesspool wall has been repaired, and the Broad Street water pump handle has been restored. Florrie likes her job as a housemaid, and Eel and Henry like living with Mr. Edwards and his wife.