My first is in the book from which the Sisters sing Office.
My third is in the part of the Habit which was given to Blessed Reginald by Our Lady herself.
My fourth is in the word that completes this oft-quoted definition: “A novice is a creature who breaks crockery, spills oil and __________________.” (This definition is truer than you would imagine.)
My whole is responsible for maintaining regular observance in the Community, and yet I cannot speak by myself.
Who am I???
[Answer in next edition :) ]