A continuing source of white anxiety related to Obeah was the belief that practitioners were skilled in using poisons, as mentioned in Matthew Lewis's "Journal of a West India Proprietor". Many white Jamaicans accused women of such poisonings; one case Lewis discussed was that of a young woman named Minetta who was brought to trial for attempting to poison her master. Lewis and others often characterized the women they accused of poisonings as being manipulated by Obeahmen, who they contended actually provided the women with the materials for poisonings. The laws forbidding Obeah reflected this fear: an anti-Obeah law passed in Barbados in 1818 specifically forbade the possession of "any poison, or any noxious or destructive substance". A doctor who examined the medicine chest of an Obeah man arrested in Jamaica in 1866 identified white arsenic as one of the powders in it, but could not identify the others. The unnamed correspondent reporting this affirmed "The Jamaica herbal is an extensive one, and comprises some highly poisonous juices, of which the Obeah men have a perfect knowledge."