 Methods of execution such as encasing victims in yak skins which were then sewn shut and left out to be exposed to the elements were used upon Catholics by the Tibetans.The Tibetans executed Father Soulié and took to the Atunze monastery the head and liver of Bourdonnec after they slayed him and Dubernard, and they vowed ""to exterminate all inhabitants ... even the dogs and chickens, up to the least blade of grass.