VATICAN CITY, APR 7, 2005 (VIS) - Archbishop Piero Marini, master of the Liturgical Celebrations of the Supreme Pontiff, has published a note on the "novendiali" or period of nine days of official mourning for the late Pope John Paul II, explaining the background and indicating the dates, times and principal celebrants of each of the nine Masses. The communique states that "according to an ancient custom, for nine consecutive days there are special Eucharistic celebrations for the repose of the soul of the deceased Roman Pontiff, starting with the funeral Mass which is determined by the Congregation...