I'll have to check the letters. I really don't know if there is much in his letters about the plant side of his life, as we knew him from the Packard side. I was searching more on his name, and found his online obituary:
http://www.tributes.com/show/8...
There is a comment from his friend Tjeerd van Oene - Hengelo (O) The Netherlands. Eddie talked about him all the time. Anyway, in his comment, he said he saved over 500 letters from a 20 year span of correspondence. I am sure this is a treasure trove of wonderful information about Eddie.
I will check my letters this weekend.
By the way, I am an avid gardener, and I am so glad that Eddie indirectly guided me here! It is a great site, and I think I will learn a lot from it.