But it displeased Jonah exceedingly, and he was angry.
There are different opinions about the exact point in this history that Jonah became angry.  Keil was of a very positive opinion that Jonah's anger did not flair until the forty days were concluded, and it became evident that God would not destroy Nineveh.  "There is nothing whatever to force us to the assumption that Jonah had left Nineveh before the fortieth day."[2]  Dean, on the contrary, thought that: