No improvement or correction is required
The excerpt given above is taken from Phillis Wheatley's poem "On Being Brought from Africa to America". The word sable literally means color black. In this line, Wheatley uses the word "sable" to indicate sense of inferiority. The author is an African and their race color is different from the rest.
(sorry if im wrong)
Answer:
When Mr. White makes the third wish.
Explanation:
Leave the first line alone
Put a comma after sea
Period after blue
Hope this helps!