A similar gun is documented and illustrated in Crudgington & Baker, The British Shotgun, Vol. ONE, pp. 22-23. In this entry, the authors identify the Montigny system as the Chateauvillier needle gun mentioned in J.H. Walsh's The Shotgun and Sporting Rifle, 1859. The Chateauvillard patent is British patent No. 12613 of 1849 and was described at the time as a 'needle gun'. The authors further mention the lack of any definite information regarding the nature of the cartridges for use in such guns, but it would appear that much of the cartridge was consumed in the detonation, a curiously modern concept. In conclusion, the authors mention that they have been fortunate to find and examine only one example of a 'Montigny System' gun, thereby confirming the scarcity of such guns