received anonymously:

"An interesting package was mailed to the home of Arthur Rosenbaum at 465 Loring Avenue, Los Angeles. Arthur is a sick and twisted animal torturer and murderer involved in the primate vivisection program at UCLA. Be careful Arthur. We are only just getting started. This action is a mere token when compared to the other things that we can and will do. Your address and your phone numbers are out along with your dirty and disgusting secrets and you will be feeling even more pressure. You have one choice. Stop vivisecting!"