The notion of a 'concert ticket from the casino' sounds rather odd, but there was, in fact, a concert hall in the casino building in Monte-Carlo, Monaco.
It was opened in 1879, and became known as the Salle Garnier (Garnier Room), after the architect Charles Garnier who designed it. Today it is known as the Opéra de Monte-Carlo (the Monte-Carlo Opera House).
Click here to see the interior of the Opera House.
Hampstead is an affluent and attractive area of north-west London, situated in the Borough of Camden. Traditionally, it has been known for the richness of its cultural and intellectual life, and for the large area of hilly parkland known as Hampstead Heath.
The Scottish Terrier is one of five breeds of terrier that originated in Scotland. It is sometimes known as the Aberdeen Terrier or, more informally, as a Scottie or Scottie Dog. With its distinctive square jaw, it is easily recognisable and has become a popular choice as a family pet.
One of the breed's claims to fame is that a tiny model of a Scottie is one of the pieces in the board game Monopoly.
Lake Geneva (known in French as Lac Léman) is a European lake, situated partly in France and partly in Switzerland.
It is the site of the famous Château de Chillon (Chillon Castle) which was the inspiration for Lord Byron's poem The Prisoner of Chillon.
It is mainly used for the Sacrament of Penance (also known as confession) in the Roman Catholic Church, but similar arrangements exist in some Anglo-Catholic and Lutheran churches.
In comparing a doctor's attitude to that of the priest in the confessional, Dr Baker is referring to the rules of confidentiality which doctors adhere to. The importance of confidentiality is highlighted in the Hippocratic Oath, an oath historically taken by doctors, swearing that they will uphold certain ethical guidelines in their work. However, until 2000, there was no statutory duty of confidentiality in the United Kingdom. Issues of confidentiality in medicine are extremely complex, and situations will arise where doctors may feel it appropriate to breach confidentiality, or may be legally obliged to do so.
Morphia was first sold commercially in 1827, and became widely-used following the invention of the hypodermic needle in 1857.
Because of its highly addictive qualities, morphine tends to be reserved for cases of extremely severe pain.
A barrel-organ (sometimes known as a roller organ, or street organ) is a mechanical music instrument enclosed in a large, often highly-decorated, wooden box. In order to play it, cylinders with encoded music on them are turned by means of a handle.
The traditional name for a player of a barrel-organ is an organ grinder. Street organ grinders often had monkeys as an extra attraction to listeners; hence the phrase, 'speak to the organ grinder, not the monkey', which means speak to the person in charge, not to his/her minion.
Roses of Picardy (or sometimes Roses in Picardy) is a well-known First World War song, with lyrics by Frederick Weatherly, and music by Haydn Wood. It was popularized by Elsie Griffin, an opera singer who entertained British troops in France. German soldiers are said to have sung their own version of it.
Listen here to Roses of Picardy on Spotify.
The shilling was a British coin, in circulation between 1707 and the decimalisation of the currency in 1971. There were twenty shillings to the pound, and 12 old pennies to the shilling.
Up until 1947, the coin was made wholly, or partially, of silver, but from 1947 onwards it was made of cupro-nickel. The informal term for a shilling was a bob (as in, "that cost me ten bob").
A shilling in today's money is the equivalent of five pence.
Between 1849 and 1967, there was also a two-shilling coin in existence. This was known either as a two-shilling piece, a two-bob bit, or a florin.
St. John's Wood is an affluent residential area in north-west London.
It is the location of Lord's Cricket Ground, and of the Abbey Road Studio where the Beatles recorded their famous Abbey Road album.
Paddington railway station in London serves South Wales and the West Country.
A temporary terminus for the Great Western Railway was built at Paddington in 1838, and the main station (designed by Isambard Kingdom Brunel) was opened in 1854.
Soho is situated in the West End of London within the City of Westminster. In the past, it has been notorious as a centre for the sex industry, but this aspect of the area has now declined.
It remains a fashionable venue for eating out, with Gerrard Street being particularly noted for its Chinese cuisine.