ten
o'clock
But I forgot to ask Nat something . I wonder if he has gone up to his room yet ? '' and Tavia rose to ascertain . `` It 's nearly ten , '' Dorothy told her , `` and he usually retires before ten o'clock . '' `` Well , I 'll just run down to the library and find out . I may forget it by morning . '' Dorothy could not help thinking that so urgent a matter as one which required that attention would scarcely be so easily forgotten , but when Tavia left the room she put her little gifts away and soon forgot all about Tavia 's sudden determination to seek Nat .