about half past seven
`` Ah ! '' said Barnabas , `` I think I know it . '' `` At sunset , sir ! '' `` That would be somewhere about half past seven , '' mused Barnabas , staring blankly , down at the book on his knee . `` Yes , sir . '' `` How came you to be carrying his letter ? '' `` He offered me five shillings to go and bring her answer . ''