Although there are twenty-eight Meditations given in this book they will
not all be needed every year, for the length of Advent varies between
twenty-two and twenty-eight days. The Third Sunday of Advent _may_ fall
as late as December 17th (the first day of the "Great O's") and the
Fourth Sunday of Advent be Christmas Eve. The plan suggested, which will
suit all years, is to use No. 1 on Advent Sunday and the rest according
to choice till December 17th; from then to December 24th Nos. 21-28
should be used.