“Now, Axel,” cried the Professor with enthusiasm, “now we are really going into the interior of the earth. At this precise moment the journey commences.”

So saying, my uncle took in one hand Ruhmkorff’s apparatus, which was hanging from his neck; and with the other he formed an electric communication with the coil in the lantern, and a sufficiently bright light dispersed the darkness of the passage.

Hans carried the other apparatus, which was also put into action. This ingenious application of electricity would enable us to go on for a long time by creating an artificial light even in the midst of the most inflammable gases.

“Now, march!” cried my uncle.

Each shouldered his package. Hans drove before him the load of cords and clothes; and, myself walking last, we entered the gallery.