James Bruce,
Select Specimens of Natural History Collected in Travels to Discover the Source of the Nile…
“ We are therefore to look upon her dying by the bite of the Cerastes, as only following the manner of death which she had seen commonly adopted by those who were intended to die without torment.Galen speaking of the Aspic in the great city of Alexandria, says, I have seen how speedily they (the aspics) occasioned death. Whenever any person is condemned to die whom they wish to end quickly and without torment, they put the viper to his breast, and suffering him there to creep a little, the man is presently killed. ”
