The term guardsmen refers to the regiments of the British Army concerned with the personal safety of the Sovereign and the royal residences.
The mounted divisions who currently act as the Queen's bodyguard are known as the Household Cavalry, which consists of two regiments: the Life Guards and The Blues and Royals (the amalgamation of the Royal Horse Guards and The Royal Dragoons).
There are also currently five regiments who guard Buckingham Palace and St. James's Palace; these are known as Foot Guards: The Grenadier Guards, The Coldstream Guards, The Scots Guards, The Irish Guards and The Welsh Guards.
During the period of Tipping the Velvet, the Irish Guards and the Welsh Guards did not yet exist.
The Paragon Theatre of Varieties was situated on the Mile End Road, in the Stepney area of London.
It opened in 1885 on the site of Lusby's Music Hall, which had been destroyed by fire. It became a cinema known as the Mile End Empire in 1912.
In the 1930s, a new cinema was built on the site; it is still in existence today, operating under the name of Genesis.
It was demolished in 1898 and a new theatre, The Bedford Palace of Varieties, was built on the site; this eventually closed down in 1959.
Both the old and the new theatres featured in paintings by the artist Walter Sickert, a member of the Camden Town Group.
Follow this link to read more about the Bedford.
Follow this link to see a Sickert painting of the Old Bedford.
Traditionally viewed as a somewhat seedy red-light district, the reputation of the area is now picking up in the wake of recent regeneration projects.
The area is the location of the major London rail terminus known as King's Cross Railway Station, opened in 1852.
Gray's Inn Road extends from High Holborn to King's Cross.
Although there is no Green Street off Gray's Inn Road at the present time, there is a Green Yard.
It depicts Jesus knocking on a disused door with no handle, which Hunt said was symbolic of 'the obstinately shut mind'.
The painting was the inspiration for an oratorio by Arthur Sullivan, written in 1873.
Hindoo is an old-fashioned spelling of Hindu.
It is famous for its lake, known as the Serpentine, and for its area of public debate and discussion known as Speakers' Corner.
Kensington Gardens lies to the West of Hyde Park.
It was formerly the private land belonging to Kensington Palace, and is one the Royal Parks.
Stratford is an area of northeast London, situated in the Borough of Newham.
Having long been a poor area, it underwent significant development and regeneration in preparation for the London Summer Olympic Games in 2012.