Memory Gaps

Drink the invisibility potion, steal the research log from Yasskul Naboo on the Isle of Singing Water and bring it to Igor Kalinin at the Rumbling Bay camp.

Hey! Be quiet and quit staring at me. Are you also annoyed by this fool, Yasskul Naboo? Sure, I get it that it's not polite to say that about your scientific leader, but most recently she really has been acting... well, strange! For example, she forgot that she had already sent me to measure coordinates. I wrote it off as her resentfulness and absent-mindedness, common to all scientists. But what I heard during her conversation with you is outrageous! What microbiology, for crying out loud?! Yasskul Naboo was at her time one of the best specialists in astral studies. One might say that her monographs opened a whole new chapter in this extensive branch of science. And then microbes... unexplainable memory gaps... Something isn't right here!
I... I feel kind of uneasy suggesting this... But I think that you should steal Yasskul Naboo's work log. She records all of the experiment data in there. It probably contains the results from the last scientific research that we performed on this island! And if my leader knowingly does not disclose information or deceives us, then the brass should know about it.
I have an invisibility potion somewhere from the emergency stash. Here, take it. The log is usually somewhere near Yasskul Naboo. Drink the potion, steal the log from Naboo when she's not looking, and bring it to Kalinin. Let's see what he will say!

Greetings. Where have you been for so long?

What? Are you sure you did not suffer a heatstroke? I remember exactly that I sent you with a package of orders for our research group that works on the neighboring island, not to help scientists in their research. They are sufficiently competent in their search of the next pill for stomach flu, caused by some local bacteria.
And what is this? A work log? Are you out of your mind?! This is the expedition's financial statement! Look: numbers in columns, abbreviated names. Accountability above all!
A work log... as if! Yes, of course, I understand that we need to be vigilant, but it needs to be a healthy vigilance, not acute paranoia!
Meanwhile, please visit our medical facility. Let the doctor examine you and prescribe some sort of a mixture that calms nerves...