The message
from "Rupert" contains these words:

I doubt it was lifted by a gardener because they don't do that sort of
thing
or do they?

I'm afraid they do; it's become a major hazard in many gardens open
to the public and some people are absolutely shameless about it. I'm
not talking cuttings and seeds, but entire shrubs and plants. You can
even buy anti-thief security-planting underground anchors for rare and
expensive plants , but they have to be installed at planting time afaik.

Janet