How long did the Prophet's magic last?

The various narrations regarding the duration of the Prophet's magic can be reconciled. The narration of "forty nights" could indicate the beginning of the magic's hold, while "six months" represents the total duration. It is found in Ma'mar's Jami' from Az-Zuhri that the Prophet remained enchanted for six months, and this is the relied-upon view. As for Wahib's narration, it does not specify the duration.