An unexpected collaboration

Exhibit A is the cover of the first edition of Colette's Claudine à l'école, published by her husband as being his own work. Later the book was presented as a collaboration, though the extent of Willy's contribution is disputed.

Exhibit B is a further treasure from the bookshelves of A Gentleman. I have not yet had a chance to read it, but assume it to be a translation of the French original.