What words did Axel see when he fanned himself with the document in Journey to the Center of the Earth?

Axel is
a reluctant hero. He is at his core incredibly cautious, and he knows that the Professor is (and
will thus act) the opposite way. The prot©g© initially hopes to keep his uncle from even
seeing the document and from realizing its significance:

If he should turn this document round and round, his may by chance discover the key! I
shall destroy it.

Initially, he and
Professor...