Question: Who is the British hangman who developed a new hanging technique and demonstrated it first at the Lincoln Castle in Lincoln, England?
Context: William Haywood (died probably in 1823) was an architect who worked in Lincoln, England.  His father John who died in 1817 was mayor of Lincoln twice and worked as a mason.  Haywood succeeded his father as mayor after his death in 1817.  His grandfather, John Hayward (1708–78) was also a mason in Lincoln.  William Hayward's great grandfather was Abraham Haywood an architect of Whitchurch, Shropshire who came to Lincoln around 1720.  William Haywood succeeded William Lumby as Surveyor to Lincoln Cathedral in 1799 and Edward James Willson followed him in this position in 1823.  William Hayward also succeeded William Lumby as Surveyor for the Lincolnshire County County Committee, which had responsibility for Lincoln Castle and the prison. Torksey Castle is a manor house located in the centre of the village of Torksey on the east bank of the River Trent in Lincolnshire, England.  It is 12 miles northwest of Lincoln on the A156 road.  Seven miles to the north is Gainsborough Old Hall and 10 miles southeast is Lincoln Castle.  It is a 16th-century Tudor stone-built fortified manor house founded by the Jermyn family of Suffolk.  The building is on the Buildings at Risk Register.  The site is strictly private, with no public access and is only visible from the A156 road and a public footpath, on the west bank of the River Trent. The Old Bishop's Palace is an historic visitor attraction in the city of Lincoln, Lincolnshire.  When it was first built, in the late 12th century, it was at the centre of the vast Diocese of Lincoln, which stretched from the Humber to the Thames.  The Palace was one of the most impressive buildings of medieval England, reflecting the power and wealth of Lincoln’s bishops.  It is situated on a spectacular hillside site, just below Lincoln cathedral, providing extensive views over the city.  The site lies immediately to the south of the Roman wall which had become the medieval defensive wall of the "Bail", which enclosed both Lincoln Castle and Lincoln Cathedral.  The palace was damaged during the Civil War and subsequently largely abandoned.  During the period that followed the Bishop’s main residence was Buckden Palace in Huntingdonshire.  In 1841, following the reduction in size of the Diocese of Lincoln, the Bishop moved to Riseholme, to the north of Lincoln.  This proved inconvenient and Riseholme was sold.  In 1886 an older building on the western side of the Palace enclosure was substantially rebuilt and enlarged in a Tudor revival style by the architect Ewan Christian.  A further change occurred in 1888 when the architects Bodley and Garner rebuilt and converted the southern portion of the medieval Great Hall into a chapel for the Bishop. The Second Battle of Lincoln occurred at Lincoln Castle on Saturday 20 May 1217, during the First Barons' War, between the forces of the future Louis VIII of France and those of King Henry III of England.  Louis's forces were attacked by a relief force under the command of William Marshal, 1st Earl of Pembroke.  Thomas, the Comte du Perche, commanding the French troops, was killed and Louis was expelled from his base in the southeast of England.  The looting that took place afterwards is known as the "Lincoln Fair".  The citizens of Lincoln were loyal to Louis so Henry's forces sacked the city. During the First English Civil War Lincoln was besieged between 3 May and 6 May 1644 by Parliamentarian forces of the Eastern Association of counties under the command of the Earl of Manchester.  On the first day, the Parliamentarians took the lower town.  The Royalist defenders retreated into the stronger fortifications of the upper town, which encompassed and incorporated Lincoln Castle and Lincoln Cathedral.  The siege ended four days later when the Parliamentarian soldiers stormed the castle, taking prisoner the Royalist governor, Sir Francis Fane, and what remained of his garrison. William Frederick Horry, also known as Fred Horry (December 1843 – 1 April 1872), was the first person to be hanged by Victorian hangman William Marwood, and the first to fall using the long drop method.  He was hanged at Lincoln Castle, Lincoln, England on 1 April 1872, aged 28, for the murder of his wife, Jane Horry. The Lawn, Lincoln, Lincolnshire, England, is a notable early nineteenth century Greek revival building designed by Richard Ingleman (who was also architect for HM Prison, Devizes).  It is next to Lincoln Castle on Union Road, 0.3 mi to the west of Lincoln Cathedral, and comprises a number of notable buildings, a hotel, rose garden and children's play area, set within a large lawn.  The Sir Joseph Banks Conservatory is an attraction for visitors, a hothouse containing exhibits categorised by Banks on his voyages with Captain James Cook. Lincoln Castle is a major castle constructed in Lincoln, England, during the late 11th century by William the Conqueror on the site of a pre-existing Roman fortress.  The castle is unusual in that it has two mottes.  It is only one of two such castles in the country, the other being at Lewes in Sussex.  Lincoln Castle remained in use as a prison and law court into modern times, and is one of the better preserved castles in England; the Crown Courts continue to this day.  It is open to the public as a museum.  Lincoln Castle remains one of the most impressive Norman castles in the United Kingdom.  It is still possible to walk around the immense Norman walls which provide a magnificent view of the castle complex, together with panoramic views of the cathedral, the city, and the surrounding countryside. Leigh-Pemberton House is a historic house located on Castle Square in Lincoln, England, located on Bailgate between Lincoln Cathedral and Lincoln Castle.  It became a Grade II* listed building on 8 October 1953.  It is a half-timbered Tudor house, originally built for a merchant in 1543.  A bank from 1899 until 1979, it was eventually given to the city of Lincoln by the Chairman of the National Westminster Bank, Sir Robin Leigh-Pemberton, (later governor of the Bank of England).  It underwent extensive restoration in 1929 and 1970.  The second and third floors have had many uses over the years but have recently been restored for self-catering accommodation. William Marwood (1818 – 4 September 1883) was a hangman for the British government.  He developed the technique of hanging known as the "long drop".
Answer: William Marwood