nine o'clock
we 'll do it separately . You flash first and then I will ; and after three flashes , we 'll leave the lights out and jump into bed at the same minute ! '' So it was settled , and the eventful occasion duly arrived . The girls ' bedtime hour was nine o'clock , but some time before that they were in their new rooms , enjoying their beauty and freshness . At quarter before nine , Dolly appeared at the Rose house , and said solemnly , `` I 've come over to wish Dorothy good-night . '' `` Come in , '' said Mrs. Rose , trying not to smile at the ceremonial visit . `` You 'll find her in her room ; go right up . ''