Obituary. The death took place on the 22 October 2004 of the theologian Louis Bouyer of the French Oratory at the age of 91.  A friend of Balthasar, Ratzinger and J.R.R. Tolkien, and a co-founder of  the international review Communio, Bouyer was a Lutheran who converted to Catholicism in 1939.  He became a leading figure in the Catholic Biblical and Liturgical movements of the twentieth century,  was an influence on the Second Vatican Council, and is best known by many for his excellent writings on the history of Christian spirituality.  His passing seems to have gone relatively almost unnoticed so far, but he deserves a flood of major tributes.  His books are highly recommended (for example, The Invisible Father, a history of religion published in English in 1999).