"There's not much to tell." He shrugged. "We had gone to an astropath to send a message to our Chapter Master. I did not know why it was more important than fighting the hive tyrant." Because Titus was, for all his admirable qualities, terrible at explaining things.

"She became possessed by a sorcerer from the Warp and accused my lieutenant of trying to scheme to bring the Chapter Master close in order to kill him." This was not a comfortable memory. "I missed the signs that she was possessed. I took her accusations as a message from Calgar himself." He thought he was doing the right thing. "As I said, Chaos will not stop at any trick or deception. I was fooled." To his great, great shame.