Dear Ailsa, Sometimes I wonder whether the friendship that has caught us both - a most unlikely friendship I must confess - might find an echo in a far off Irish village somewhere in the wild, windy hills of old Donegal. Or am I allowing that uncontrollable imagination of mine too much slack? This is the story of an unlikely friendship. When priest and Sydneysider Tony Doherty emailed Melbourne-based writer and performer Ailsa Piper to say how much he had enjoyed her latest book, he was met with