chunk: After the horizontal propellers are damaged in a storm, the Albatross is anchored over the Chatham Islands for repairs. While the crew is busy at work, the two Weldon Institute members light a fuse and make their escape. They try to bring the valet with them but cannot find him, only later discovering that he had already escaped without them. The Albatross explodes and its wreckage, along with Robur and his crew, plunge into the ocean. Meanwhile, the three escapees are safe on a small but inhabited island and are later rescued by a ship, then make a long journey back to Philadelphia.
  The Weldon Institute members return, and rather than describe their adventures or admit that Robur had created a flying machine greater than their expectations of the Go-ahead, they simply conclude the argument the group was having during their last meeting. Rather than have only one propeller to their dirigible, they decide to have one propeller in front and another behind, similar to Robur's design.