midnight
`` And is it possible he can be my father ? '' `` It is as I have told you , '' replied Herne . `` You now know my resolve . To-morrow at midnight our nuptials shall take place . '' `` Nuptials ! '' echoed Mabel . `` Ay , at that altar , '' he cried , pointing to the Druid pile of stones ; `` there you shall vow yourself to me and I to you , before terrible witnesses .