Thanks CD for his note and his new book [Movement in plants].

Makes him feel "we must go beyond plants for a really elemental pathology".

Wishes he knew enough about crystals to work at them.

Perhaps you would like to see a very small “tumour” on a lateral branch of the Silver Fur, caused by an Œstrum, as stated (with references) in my Power of Movement in Plants. These tumours are sometimes almost as big as a child’s head. At what age they emit the upright shoot, I do not know.