Morena rode alone through the city streets; she didn't take any of the soldiers with her because what she wanted to do, she needed to keep under wraps.
What exactly was that? Well, she planned to meet someone who could give her a clue about whether the church was involved in this matter or not. But she couldn't draw attention to them, or herself, while doing this.
That person was the clerk. The pathetic little man who had been dragged into her service by force rather than by loyalty. The poison still worked; the man hadn't tried to step out of line yet, he was still too scared.
Of course, she didn't trust him completely; she didn't trust that her plan would hold his leash without a chance of slipping. That was why she left someone to keep an eye on him, as well as deliver the 'antidote' to him in regular doses.
Hark.
The man she entrusted to watch over the movement of the clerk. He was trustworthy enough that he never questioned her orders; he executed them with perfection.