Complex sentence: More recently, some of her personal correspondence from the years 1950 to 1964 have surfaced, including letters that were written by her to Irish priest Joseph Leonard, whom she had twice met while in Ireland.
Split into simpler sentences: More recently, her personal correspondence from the years 1950 to 1964 have surfaced. The letters were written by her to Irish priest Joseph Leonard, whom she had twice met while in Ireland.