Though the first four plays in this book were written for earth and the rest for air; the rest have all been done in their appropriate element. Probably the future of plays for the air lies with television. At present every character has to be slightly exaggerated, so that the audience shall have no doubt as to who is speaking; even each voice has to be rather unusual, so that it cannot be mistaken for any other voice in the cast. When the audience can see each actor, none of these things will be necessary. Radio plays may even compete with the theatres then; or rather the arm-chair and the fire from which such plays may be watched will compete with the best seat of any theatre in the world