Well, I am almost speechless! I very recently was lucky enough to purchase a rare PROOF copy of the 1960 Colossus. Exciting, exciting, exciting and coming soon. It is currently somewhere in the air winging its way here.
The seller revealed the person they purchased it from literally found it in the bottom of a box at a sale... WOW! Yes, it does occasionally happen.
The name on the front and the bookplate is 'Sadie Balkind'. I have discovered there is a scholarship named after her in New Zealand, where the book is coming from... the search begins.