The Last Straw
'What was that you said about our having an appointment at half-past seven?' asked Mr Cupples as the two came out of the great gateway of the pile of flats. 'Have we such an appointment?'
'Certainly we have,' replied Trent. 'You are dining with me. Only one thing can properly celebrate this occasion, and that is a dinner for which I pay. No, no! I asked you first. I have got right down to the bottom of a case that must be unique—a case that has troubled even my mind for over a year—and if that isn't a good reason for standing a dinner, I don't know what is.