It was a book about some mysterious disappearances and two young lovers. One of them eventually goes missing. I think it was the boy, but I forget exactly. I think the missing lover died, but whichever one went missing was taken by ghosts. The lover was buried alive if I remember correctly. The ghosts were of abused boys at an academy for boys who were very bad. They had been whipped and would say numbers of lashings. They would say something like "25, 100! 25, 100!" That is all I remember.