"The Cossacks" Edition Discrepancies

[Madeline]

I have the 1960/61 edition of this book, and thought I'd add a cover image for the page. After some difficulty with a sideways image (now fixed), I also realized that some reviewers say that the book contains the stories The Cossacks, The Sevastopol Stories, and Hadji Murat. However, this older Penguin edition contains The Cossacks, Happy Ever After, and The Death of Ivan Ilyich. The ISBN (0140441093) and translator (Rosemary Edmonds) on my edition seem to align properly. Any advice on splitting up these books? Having looked through some of the other editions out there, it seems like there's lots of clarification needed.