I've decided to have my villain try to poison one of my MC's clients, but he won't succeed in killing him. He's going to use black caviar adulterated with botulism toxin. My idea is to create the effect that the victim "should have" died, if not for the quick thinking, last-minute intervention, whatever, of Dr. So-and-so. (Cue dramatic music.) I understand that it takes a few hours for botulism to do its dirty work, and the symptoms are often confused with several other maladies. Assuming the victim goes to a doctor, what would tip off a reasonably-savvy physician to test for botulism and not put it down to some other kind of food poisoning? Particularly if the remains of that jar of caviar have mysteriously disappeared from the victim's private office fridge? Since botulism affects speech, would the victim be able to give any clues? And oh, yeah: How hard would it be for a very wealthy person get hold of botulism toxin in the early 1980s?