Samuel Williams, commanding officer of the Carthage Greys, writes a letter describing the happenings at Carthage jail. Williams says that when Joseph first arrived in Carthage and met with such an ugly reception, he "actually fainted." THE HISTORY OF THE CHURCH denies a rumor that he had "fainted three times." but this may be consistent with him fainting once.
[On This Day in Mormon History, http://onthisdayinmormonhistory.blogspot.com, based on Michael Quinn's Mormon Hierarchy vols 1 & 2]