Question

Order the events of these chapters. (based on book twenty thousand leagues under the sea)

encountered a shoal of argonauts
passed through a milk sea visited the pearl bed and saw a giant pearl encountered a shark
sailed through the Red Sea
passed through a secret tunnel under the isthmus of Suez
battled a giant dugong
Ned plotted an escape
Captain Nemo passed a box of ingots to a diver off Crete
stop at Vigo Bay foiled the escape attempt

Answer 1

that is in perfect order except they battled a giant dugong and THEN passed through a secret tunnel under the isthmus of Suez. 

Answer 2

The correct order in which things happen in Twenty Thousand Legues Under Sea is the following:

• encountered a shoal of Argonauts
• passed through a milk sea visited the pearl bed and saw a giant pearl encountered a shark
• sailed through the Red Sea
• battled a giant dugong

• passed through a secret tunnel under the isthmus of Suez

• Ned plotted an escape
• Captain Nemo passed a box of ingots to a diver off Crete
• stop at Vigo Bay foiled the escape attempt

It was all perfectly lined with, with the exception of these two:

"battled a giant dugong" & "passed through a secret tunnel under the isthmus of Suez". The order in which it happens was swapped in the question.