Chapter ( 4 ) A) GOING DOWN TO THE BOTTOM OF THE MIDDLE CHIMNEY The sun shone on the fourth day. The shadow of Scartaris fell on the middle chimney. So, they prepared to descend it. Hans put the supplies and the tools in a bag and let it down with a rope. Then they descended one after the other with the help of a rope tied to the edge of the chimney. It was very tiring. The chimney was getting narrower downwards. They reached the bottom at midnight. The Professor had examined the rocks and found out that the centre of the earth was not hot. Early in the morning, a ray of sunlight woke them up. The lava walls around them were shining. The sunlight came from the chimney. B) GOING INTO A PASSAGE TO THE RIGHT The characters left the main chimney and went into a passage to the right. With the help of a strong electric torch, they went forward. They spent the night in a cave with air and wind. Axel was worried because they did not find any springs of water as the Professor had expected. They had used half of their water. At noon, they reached the end of the passage. It divided into two paths one going east and the other going west. The Professor pointed to the eastern path and they got into it.