Street for public viewing. Dense crowds of thousands of spectators could pack the streets to see these events, and in 1807 dozens died at a public execution when part of the crowd of 40,000 spectators collapsed into a human crush. From 1868, public executions were discontinued and executions were carried out on gallows inside Newgate, initially using the same mobile gallows in the Chapel Yard, but later in a shed built near the same spot. Dead Man's Walk was a long stone-flagged passageway, partly open to the sky and roofed with iron mesh (thus also known as Birdcage Walk). The bodies of the executed criminals were then buried beneath its flagstones. Until the 20th century, future British executioners were trained at Newgate. One of the last was John Ellis, who began training in 1901. In total – publicly or otherwise – 1,169 people were executed at the prison. In November 1835 James Pratt and John Smith were the last two men to be executed for sodomy. Michael Barrett was the last man to be hanged in public outside Newgate Prison (and the last person to be publicly executed in Great Britain) on 26 May 1868. Notable prisoners Other famous prisoners at Newgate include: Thomas Bambridge, warden of Fleet Prison in the 1720s – imprisoned for extortion and murder George Barrington, pickpocket – held at least twice in Newgate between 1783 and 1790, before transportation to Australia John Bellingham, assassin of the Prime Minister Spencer Perceval 1812 – hanged in 1812 John Bernardi, soldier and Jacobite conspirator – imprisoned without trial in Newgate for forty years Robert Blackbourn, Jacobite conspirator – imprisoned without trial in Newgate for fifty years John Bradford, religious reformer – burned at the stake at Newgate in 1555 Giacomo Casanova, Venetian libertine – imprisoned for alleged bigamy Ellis Casper, who helped to perpetrate the 1839 Gold Dust Robbery – held in Newgate before being transported to Van Diemen's Land in 1841 Elizabeth Cellier, also known as the "Popish Midwife", midwife – incarcerated in 1679–1680 during a high treason trial for the alleged "Meal-Tub Plot" William Chaloner, currency counterfeiter and con artist – imprisoned multiple times at Newgate between 1696 and his hanging 1699 for high treason Marcy Clay, thief and highwayrobber who dressed as a man, died by suicide before she could be hanged in April 1665 William Cobbett, Parliamentary reformer and agrarian – imprisoned 1810–1812 for