Speaking as someone with an obsessive interest in butterflies and
moths I would like to say this that firstly, crysalises DO NOT
WALK!!!!They can not walk. The description of what you saw matches the
adult caterpillar of a Large Elephant Hawk Moth. It would have been
walking to soil in order to bury itself and pupate. The moth that will
eventually hatch is one of the most beautiful in this country - bright
cerise pink and green. You are priviledged.

Helen