paragraph_text: Spires of Spirit, by Gael Baudino, is a collection of six novellas set in the universe of The Strands Series. It was first published in 1997 by Roc Books. The first three stories take place in the time period just prior to "Strands of Starlight" and second three take place in 1990s Denver, USA, about ten years after the flashforwards in "Shroud of Shadow" and before the events depicted in "Strands of Sunlight".

paragraph_text: A mercury barometer has a glass tube closed at one end with an open mercury - filled reservoir at the base. The weight of the mercury creates a vacuum in the top of the tube known as Torricellian vacuum. Mercury in the tube adjusts until the weight of the mercury column balances the atmospheric force exerted on the reservoir. High atmospheric pressure places more force on the reservoir, forcing mercury higher in the column. Low pressure allows the mercury to drop to a lower level in the column by lowering the force placed on the reservoir. Since higher temperature levels around the instrument will reduce the density of the mercury, the scale for reading the height of the mercury is adjusted to compensate for this effect. The tube has to be at least as long as the amount dipping in the mercury + head space + the maximum length of the column.

paragraph_text: Trinidad is an elevated metro station on the Line 4 of the Santiago Metro, in Santiago, Chile. The side platforms and tracks are wrapped in a large elliptical cross section tube. The station has a mezzanine area below the tracks.

paragraph_text: Hutton station is on the Canadian National Railway mainline in Hutton, British Columbia. Via Rail's Jasper – Prince Rupert train calls at the station as a flag stop.

paragraph_text: Lanham is an unincorporated community and census-designated place in Prince George's County, Maryland. As of the 2010 United States Census it had a population of 10,157. The New Carrollton station (the terminus of the Washington Metro's Orange Line) as well as an Amtrak station are across the Capital Beltway in New Carrollton, Maryland. Doctors Community Hospital is located in Lanham.

paragraph_text: In electronics, the dynatron oscillator, invented in 1918 by Albert Hull at General Electric, is an obsolete vacuum tube electronic oscillator circuit which uses a negative resistance characteristic in early tetrode vacuum tubes, caused by a process called secondary emission. It was the first negative resistance vacuum tube oscillator. The dynatron oscillator circuit was used to a limited extent as beat frequency oscillators (BFOs), and local oscillators in vacuum tube radio receivers as well as in scientific and test equipment from the 1920s to the 1940s but became obsolete around World War 2 due to the variability of secondary emission in tubes.

paragraph_text: The Transbay Tube is an underwater rail tunnel which carries Bay Area Rapid Transit's four transbay lines under San Francisco Bay between the cities of San Francisco and Oakland in California. The tube is long; including the approaches from the nearest stations (one of which is underground), it totals in length. It has a maximum depth of below sea level.

paragraph_text: Series production of the Cullinan is expected to begin in the second half of 2018, while first customer deliveries will take place in the first quarter of 2019.

paragraph_text: The music video for ``Video Killed the Radio Star '', written, directed and edited by Australian Russell Mulcahy, was produced on a budget of $50,000. It was filmed in only a day in South London, and was edited in a couple of days. Mulcahy asked Virginia Hey, a friend who was a model and aspiring actress, to dress`` in a silver costume and be lowered via wires in a test tube.'' There were about 30 takes required for shots of the actress in the tube. The tube falls over in the video, although Mulcahy claims it was not intended to be shown in the final edit. Hans Zimmer can be briefly seen wearing black playing a keyboard, and Debi Doss and Linda Jardim, who provided the female vocals for the song, are also seen.

paragraph_text: The Pauper Millionaire is a 1922 British silent comedy film directed by Frank Hall Crane and starring C.M. Hallard, Katherine Blair and John H. Roberts. It was based on a novel by Austin Fryers.

paragraph_text: The Eustachian tube / juː ˌsteɪ. ʃən /, also known as the auditory tube or pharyngotympanic tube, is a tube that links the nasopharynx to the middle ear. It is a part of the middle ear. In adult humans the Eustachian tube is approximately 35 mm (1.4 in) long and 3 mm (0.12 in) in diameter. It is named after the sixteenth - century anatomist Bartolomeo Eustachi.

paragraph_text: Brondesbury Park is a suburb and electoral ward of the London Borough of Brent. It is the part of Brondesbury which is not interwoven with Kilburn due to the naming of a major tube station (Kilburn) and is centred on Brondesbury Park railway station and the street, an avenue, which shares its name. The area has a number of open spaces, primarily: Queen's Park and Tiverton Green.

paragraph_text: Lampugnano is a station on Line 1 of Milan Metro in Milan, Italy. The underground station was opened in 1980 and is located on Via Giulio Natta, in Lampugnano district, from which it takes its name. It's an underground station, placed within the urban fare limit. It is located near the Palasharp and the main terminal for intercity bus service.

paragraph_text: The Eustachian tube, also known as the auditory tube or pharyngotympanic tube, is a tube that links the nasopharynx to the middle ear. It is a part of the middle ear. In adult humans the Eustachian tube is approximately 35 mm (1.4 in) long and 3 mm (0.12 in) in diameter. It is named after the sixteenth - century anatomist Bartolomeo Eustachi.

paragraph_text: Old Kupferdreh station () was built by the Prussian state railways in the Essen district of Kupferdreh in the German state of North Rhine-Westphalia and opened in 1898 on the Prince William Railway. The station is close to the start of the first German railway, which was opened on 20 September 1831 by the Deil Valley Railway Company to Nierenhof.

paragraph_text: The Crown evolved out of Morgan's 2006 film The Queen and 2013 stage play The Audience. The series is intended to last 60 episodes over six seasons, with 10 one - hour episodes per season, covering Elizabeth's life from her younger years to her reign, and with new actors being cast every two seasons. Claire Foy portrays the Queen in the first two seasons, alongside Matt Smith as Prince Philip and Vanessa Kirby as Princess Margaret. Olivia Colman will take over as the Queen and Tobias Menzies as Prince Philip in the third and fourth seasons. Filming for the series takes place at Elstree Studios in Borehamwood, Hertfordshire, with location shooting throughout the United Kingdom.

paragraph_text: Dark Desire is the second book in Christine Feehan’s Dark Series. It takes place roughly 25 years after the events in "Dark Prince".

paragraph_text: The Prince and the Pauper is a novel by American author Mark Twain. It was first published in 1881 in Canada, before its 1882 publication in the United States. The novel represents Twain's first attempt at historical fiction. Set in 1547, it tells the story of two young boys who are identical in appearance: Tom Canty, a pauper who lives with his abusive father in Offal Court off Pudding Lane in London, and Prince Edward, son of King Henry VIII.

paragraph_text: London Underground A deep - level Central line train at Lancaster Gate bound for Ealing Broadway A larger sub-surface Metropolitan line train at Farringdon bound for Aldgate Overview Locale Greater London, Buckinghamshire, Essex, Hertfordshire Transit type Rapid transit Number of lines 11 Number of stations 270 served (260 owned) Daily ridership 5 million Annual ridership 1.379 billion (2016 / 17) Website London Underground Operation Began operation 10 January 1863; 154 years ago (1863 - 01 - 10) Operator (s) London Underground Limited Reporting marks LT (National Rail) Technical System length 402 km (250 mi) Track gauge 1,435 mm (4 ft 8 ⁄ in) standard gauge Electrification 630 V DC fourth rail Average speed 33 km / h (21 mph)

paragraph_text: The system's first tunnels were built just below the surface, using the cut - and - cover method; later, smaller, roughly circular tunnels -- which gave rise to its nickname, the Tube -- were dug through at a deeper level. The system has 270 stations and 250 miles (400 km) of track. Despite its name, only 45% of the system is actually underground in tunnels, with much of the network in the outer environs of London being on the surface. In addition, the Underground does not cover most southern parts of Greater London, with less than 10% of the stations located south of the River Thames.

Question: When was the first tube station in the city where the prince and the pauper happened?
Answer: 10 January 1863