I listened to this via LibriVox, which was narrated using the Project Gutenberg version apparently. The Gutenberg version has been cut short about half way through, so the LibriVox recording is "abridged" at best, but more likely bowdlerized by some unseen hand long ago. The full unabridged story is available from the original source: the 1856 copy of Household Words at Internet Archive.

Dickens wrote the long intro up to where John Steadiman takes over the narrative, which is then picked up by Wilkie Collins. Other authors contributed the later stories. Dickens envisioned the ship wreck story as being an introductory frame narrative from which to hang other stories written by his team at Household Words magazine: in the frame story, survivors would tell tales to pass the time in the open boats. Overall I found the whole thing confusing and sentimental, and un-Dickens.