Retcon

The Chronoscope
As soon as you arrive at the excavation site, if inquired, it will only reply:
 * Retcon: Miss Nelle Gann is in charge here - you should speak with her.

After you talk to Nelle Gann and she welcome you as guests, if you talk to it again, it will say:
 * Retcon: Miss Nelle is too trusting - I shall watch you, as I watch Tremas and his men.