Hi Larry
I did see numerous articles on the blight/canker affecting Butternut trees here in North America. It reminded me of another 'plague' that essentially wiped out another species of trees here in NA - American Chestnut.
IIRC, this was introduced to North America some time back.
Here's a little info on the Butternut rescue effort being conducted by one group
http://cobjon.com/butternut.html
On another side note, when I lived near Nashville I had several huge trees on the edge of our property. Several were Tulip Poplars, one was an incredibly large Sweet Gum, and one I did not know until I started my investigation on Butternut. It's sad to note that the owners who purchased our place cut all the trees down shortly after they took possession, and that these trees became nothing more than an incredibly large bonfire

instead of rough lumber for instrument building
all the best,
R