This is a beautiful and informative article by Dave Sorokowsky (Paph Paradise) presented at the Nov. 2022 Slipper Orchid Symposium. Hadley’s crosses are legendary and beautifully documented here. I was fortunate to visit Hadley about a year after he announced his retirement and picked up seedlings of 4 of the beauties pictured in the article. The two that have bloomed so far show promise. If you can, it would be worth the effort to get this article.