I am reading the Jules Verne novel 20,000 Leagues Under the Sea in the translation by Anthony Bonner published in 1962 by Bantam Books.
In chapter 20 around the 16th paragraph on pg. 163 begins:
On January 2, we had traveled 11,340 miles, or 5,250 leagues from our point...
I did some research and it appears that a league is defined as three miles on land. Correspondingly a "nautical league" is defined as three nautical miles.
Therefore, whether or not the author is referring to leagues or nautical leagues (as long as the appropriate mile unit is used) this math doesn't seem correct. It seems to suggest that a league is just 2.16 miles.
Where is my error in this? Is there an error in the text or have I misunderstood the definition of the unit "league."