invented to keep out the cold
I did in fact have something else to say before you cast the Geas, and I said it. Aside from that, I have communicated no essentially verbal information directly to you which was known to me to not be true. My precise body language was at various times misleading in a variety of ways, which I anticipate but am not certain you would prefer not to spend the time expounding on. I cannot attest to the truth of any messages you left for yourself, and while I replicated the letter as I remember someone appearing you be you giving it to me, I had only strong evidence it was in fact given to me by a Felandriel Morgethai.
The telepathic impression of a pause, as if realizing something. There isn't an actual pause, but telepathy can communicate the sentiment without actually breaking a flow. (She hadn't actually realized that was possible, but it is and it lets her be more open, so apparently it's obligatory.)
—Possibly relevant to this matter, the security measures around and the appearance of the location we are currently in were familiar to me. Assuming for the sake of argument that that page was indeed added to my mind by a Felandriel Morgethai, I still do not know whether or not she was acting of her own unaltered will, but I had no evidence she was not. If she was at some point misled, I would not know it.
A break, and the impression of a deep breath to organize her thoughts, as if about to rattle off a list. Her actual body language starts shifting towards the same, but it's still in the middle of the pause, which gives a somewhat strange effect visually.
If I was misled, I would not know it.
My communications with the Bank of Abadar have in many cases been intentionally misleading, and inasmuch as you observe those communications they were not true.
The same holds for my communications with various other parties, but none I anticipate being relevant.
To the extent you may have attempted to cast divination spells on me, I have attempted to mislead them, and while I doubt I succeeded if you took any such actions I may have successfully communicated false information to you at some point in that fashion.
This is almost certainly not an exhaustive list of every possible method of communication I have used which may at some point have given you false information directly as a consequence of my actions, but I anticipate you do not in fact want me to produce a fully exhaustive list, and therefore further completeness would be contrary to your intent in your Geas wording despite being indicated by the words you in fact communicated. Telepathic impression of shutting up and sitting on her hands. (Why her hands may not be clear to Felandriel Morgethai, but neither she nor the Geas appear to think this requires further explanation, so it will do.) She doesn't actually sit, just returns to the same posture as before, giving up on the half-completed deep breath she was in the middle of.