it is known that many instruments that bear his label are inauthentic. a cello once owned by pablo casals was for many years thought to be a bergonzi because of the label it bore indicated: "carlo bergonzi . . . 1733." it was later found to have actually been made by matteo goffriller. in 1881 a sensational court case was held in london over claims that the well-known luthier georges chanot iii had given a fake bergonzi label to a violin and then sold it as genuine. his deception was discovered by violin-maker william ebsworth hill but chanot qualified his admission of guilt by claiming that this was common practice in the violin-selling business; the court was unconvinced by his explanation and found him guilty.