The Twelve Dancing Princesses

Every night, their doors are securely ______

The Twelve Dancing Princesses is a German fairy tale collected by the Brothers ______

Charles Deulin collected another, French version in his Contes du Roi Cambrinus (1874), which he credited to the Grimm ______

Alexander Afanasyev collected two Russian variants, entitled 'The Night Dances', in his Narodnye russkie ______

The tale was published by the Brothers Grimm in the first edition of Kinder- und Hausmärchen, volume 2, in ______

Who collected a French version of 'The Twelve Dancing Princesses' and credited it to the Grimm version?

In which year was 'The Twelve Dancing Princesses' published by the Brothers Grimm in the first edition of Kinder- und Hausmärchen?

Who was the original source of 'The Twelve Dancing Princesses' for the Brothers Grimm?

What is the Aarne-Thompson type of 'The Twelve Dancing Princesses'?

Which Russian folklorist collected two Russian variants of 'The Twelve Dancing Princesses'?