Goofs

Miss Harrison's assistant appears at Ferndell to help take Enola's measurements, although Miss Harrison arrived alone in her automobile. She later appears at the "finishing school".

When Enola finds Tewkesbury at the flower stall, he gives her a pinkish open rose. Later, as they walk away, the rose is much more closed.

In the warehouse when Enola is being pushed head-first into the bathtub full of water, it is clear from the external shot that she is in the short edge of the bath, and her hands are both placed widely apart and just above her head. Every shot under the water is taken from the long-edge of the bath with her hands just below her chin next to her shoulders. These placements switch repeatedly as the shot cuts above and below the water.

In the beginning, a drawing of Enola indicates that she was born in 1884. As the story takes place when she is 16, that would make the year 1900. However, the newspaper that Sherlock is reading, which includes a story on the missing marquess, also reflects the year to b3 1884.

The movie is set in 1884; however, in the credits a button for an opera at St. James Theatre dated 1885 is pictured. It is logical to assume this might be from later in Enola's life, but otherwise would not fit the time line in which the movie was set.

However, as the "anomaly" appears in the credits, per IMDb Guidelines, this is not considered a Goof.

The young marquess cannot take his seat in the House of Lords until age 21.

Tewkesbury's mother would be Lady Basilwether, not Lady Tewkesbury. Whether Tewkesbury is their surname or not, a peer and his wife (or widow) would only be called Lord and Lady Title. Never surname, and especially never the surname that was also the courtesy title of their son.

When Mycroft and Sherlock are playing billiards, they are using a snooker (a British billiards game) table, which can potentially score high value points with red and colored balls. This is seen at the point tracking scoreboard. However, they are only using it for carom (3-ball) billiards , which does not have any pockets.

One of the underlying premises is that Enola's mother is involved in the suffrage movement and that her group were planning a violent (or militant) action involving explosives. Militancy in the suffrage movement did not occur until 1903, some twenty years after the time set in this film, and involved cases of arson.

Miss Harrison's car did not go on sale until the year after the film is set. It would have been impossible for her to already have one in 1884.

However, IMDb Guidelines for "Anachronisms" states that they "allow a good deal of leeway with antique equipment and machinery as long as it is 'of the period' - a 1943 variant of a military airplane in a movie set in 1942, for instance, will not qualify as a goof." Therefore, the car does not constitute a "Goof".

At the end looking down on a London street scene, a number of horse-drawn vehicles are passing by. However they are travelling as they should be in London, when travelling on a one-way street.

(at around 1h 17 mins) After Enola Holmes has been caught in the B&B, the scene goes onto a London street, and two carriages are seen correctly passing each other, because they are traveling down a one-way street.

(at around 37 mins) Pall Mall Gazette #6220 is seen (with the DISTURBANCE ON LONDON EXPRESS article on the left page. About 50 minutes later, Pall Mall Gazette #6207 can be seen (with the headline DEADLOCK IN LORDS AS VOTE LOOMS). The number of the latter should be bigger than the former's.

Enola and Tewksbury leave in the very early motor car. They swerve on a gravel road, yet the tires squeal. Tires wouldn't make such a noise on this surface, especially not with such an ancient car.

The carriages at the end are on the right side of the road. The norm in the UK always has been to drive on the left; it became law in 1835.

When Enola and the Marquess are in her lodgings, she says "What did you do, rent a room at the Ritz?" Cesar Ritz didn't open his London hotel until 1906.

When Linthorn is emptying spent shotgun casings in the hall, the casings are made of plastic with brass primers. In the late 19th century, the casings would have been made of exclusively brass or paper.

The film is set in 1884 and Enola meets Viscount Tewksbury on a train with an internal corridor connecting the compartments and connecting carriage to carriage. These railway coaches were not introduced to trains in Britain until the start of the 20th century to allow passengers to enter the newly installed dining cars.

In the end fight Linthorn was discharging plastic shotgun cartridges, they were not used until the 1960s; paper cartridges were used before then.

The martial arts handbook's title uses the term "jujutsu", but that is from the Hepburn Romanisation of Japanese which was not published until 1886 (2 years after the film is set) and did not become common until much later. In 19th century English "jiujitsu" was the preferred spelling. Later in the film, Enola pronounces it "jujitsu" in contrast with the title of the manual she studied.

When they are being shot at in the mansion, the sound of the firearm is of a bolt action rifle, not a double-barrel shotgun.

Limehouse Lane is pictured directly south of the river to St Paul's. It is more likely to have been in Limehouse East London and not in sight of St Paul's.

It is not surprising that Enola's embroidery at the finishing school is wretched, since she had not done any previously, but someone as well-read as she, taught by an educated mother, would not have misspelled the word "patience".

In the encrypted cipher message Enola sends to her mother in the Pall Mall Gazette, the 9th column should actually read NYIM, not NMIY.

Every British marquess also has at least one lower title (earl, viscount or baron), which his eldest son uses during his father's lifetime. For example, the heir apparent to the Marquess of Salisbury is known as Viscount Cranborne. He would rarely have occasion to mention any of his titles other than the highest.

If a lord has succeeded to the senior title only recently, he might plausibly announce himself as "Viscount Tewkesbury, or rather the Marquess of Basilwether", as he is not yet accustomed to the new title. But here he makes no such hesitation.

Because of how he presented himself to Enola, it is natural for her to think of him as Tewkesbury, but no one else who utters that name has any good reason to do so.

Viscount Tewksbury represents a mushroom he picks from grassland as Agaricus Lanipes, aka the Princess Mushroom, but it is instead a Chanterelle mushroom, which does not grow in grassland.

When Enola and the viscount return to his home, he asks, "Where are all the servants?" as they enter an empty hallway. Enola replies, "Welcome to the future", indicating she thinks servants will soon be a thing of the past. Such thinking, however, was not in the least common in the 1880s, even with the reform bill and progressive changes. Moreover, there's no way an estate as huge as the viscount's could even consider running without a large staff.