‘Why? I can only guess. But I do know who the bastard was.’ ‘You know? How do you know?’ ‘Because they left their initials burnt into the cauterized synapses. They left them there for me to see.’ Ford stared at him in horror and felt his skin begin to crawl. ‘Initials? Burnt into your brain?’ ‘Yeah.’ ‘Well, what were they, for God’s sake?’ Zaphod looked at him in silence again for a moment. Then he looked away. ‘Z. B.,’ he said quietly.