Dino the Dark Dragon has been having some fun with his website, I see.

I have recently turned my reverse engineering attention to games other than Ultima 1. Thanks to the file format documentation at xu4 and at the Codex of Ultima Wisdom, I managed to extract all the dialogues for Ultima 4 (except for Lord British and Hawkwind, who I believe are special characters). I have added these to a new Ultima 4 Dialogue page, where you can either interactively converse with the NPCs as if you were in the game (e.g. talk to Iolo) or else view their individual transcripts.

And indeed, if you click on over to the Ultima 4 dialogue page at Dino’s site, you’ll find a list of nearly every NPC in the game (excepting Lord British and Hawkwind, as noted above), sorted by town/location. Clicking on the “Dialogue” link for an NPC takes you to a screen similar to the above; links to dialogue transcripts are also provided.