Some words are so confusable you can sense the typo around the corner before you get to it.
So it is with a leaflet from a neighbour who is raising funds for the Britain Nepal Otology Service. This worthy organisation sends medical teams to Nepal to treat ear problems. They don't treat people who are unsure whether they exist: that's the Britain Nepal Ontology Service mentioned on page 2.
I wonder if there is a Britain Tibet Ontology Service.