Use
There is no contemporary first-hand account of those devices or their use. An early mention of a spring-loaded gagging device is in F. de Calvi's L'Inventaire général de l'histoire des larrons ("General inventory of the history of thieves"), written in 1639, which attributes the invention to a robber named Capitaine Gaucherou de Palioly in the days of Henry of Navarre.
Further mentions of the device appear in the 19th century. They are also mentioned in Grose's Dictionary of the Vulgar Tongue (1811) as "Choak Pears," and described as being "formerly used in Holland."[5]
They were also discussed in a book by Eldridge and Watts, superintendent of police and chief inspector of the detective bureau in Boston, Massachusetts (1897). While accepting that ordinary pear-shaped gags exist, they observed that contemporary robbers used no such device as Palioly's Pear and cast doubt upon its very existence in the first place, saying that "fortunately for us this 'diabolical invention' appears to be one of the lost arts, if, indeed, it ever existed outside of de Calvi's head. There is no doubt, however, of the fashioning of a pear-shaped gag which has been largely used in former days by robbers in Europe, and may still be employed to some extent. This is also known as the 'choke-pear', though it is far less marvellous and dangerous than the pear of Palioly."
Though there is little or no evidence of its being used by bandits, there are a number of examples of ornate and elaborate, pear-shaped devices with three or four leaves or lobes, driven by turning a key that rotates the central screw thread, which spreads the leaves. These are generally held in museums devoted to the subject of torture, and are described as instruments of torture by distension or evisceration. Some, but not all, have small spikes of uncertain purpose at the bottom of each leaf. However, these devices do not seem to match the descriptions given by Calvi or the 19th century sources.