Joseph Smith arrives in Philadelphia, returning to Nauvoo in February. Benjamin Winchester would later accuse the Prophet of fathering a child with a "Miss Smith (Hannah Dubois Smith) during his stay. Winchester alleged that Joseph arranged for her to marry Philo Dibble to cover it up. However that marriage didn't occur until twelve months after Joseph left the East and Hannah and Philo's first child was not born until eleven months after the marriage.
[Hales, Brian C., Joseph Smith's Polygamy: History and Theology, 3 vols., Salt Lake City: Greg Kofford Books, 2013 (www.JosephSmithsPolygamy.com)]