four o'clock
School etiquette is very strict , and Winona would have perished sooner than resign her library duties . She felt a martyr , but resolved to smile through it all . Garnet contemplated the problem at leisure during her drawing lesson , and arrived at a daring conclusion . Without consulting her friend she marched off at four o'clock to the prefects ' room , a little sanctum on the ground floor where the minutes ' books of the various guilds and societies were kept , and where the school officers could hold meetings and transact business . As she expected , Margaret was there alone , and said `` Come in '' in answer to her rap at the door . The members of the Sixth kept much on their dignity , so it was rather a formidable undertaking even for a Fifth Form girl to interrupt the head of the school . Margaret looked up inquiringly as Garnet entered .