In "The Song of the Flying Fish" by G. K. Chesterton, the author was describing a group of neighbours, a collector, a priest, a biologist, a bank manager and a traveller, that usually got together in each other's house saying:
That afternoon, one stranger had indeed broken into the magic circle: a hatchet-faced fellow with fierce tufts of eyebrows and moustache, and so shabbily dressed that he must have been a millionaire or a duke if he had really (as was alleged) come down to do business with the old collector.
How can he be "so shabbily dressed" and "must have been a millionaire"?!
Is there is something wrong in the text?