midnight
`` But why must you stay out _ here _ to do it ? '' he groaned . `` Because this is a new bridge . I 'd hate to be a professor , and not know that it has to be in the middle of a new bridge , at midnight , over running water , in the moonlight . Now you keep still and be nice ; I want to see who 's going to get married . Here is Grace Noir , and here is Fran ... '' `` And where am I ? '' asked Abbott , in an awed voice , as he bent down .