It must have been another one of those
"uncoincidences" that I was having my own snail experience a world away at the site of "The Nine Staines." We had to climb over quite a bit of "heath and hill" to get to the stones. During the walk back, Hubs spotted this little critter that nearly ended up beneath his foot. I snapped the creature's photo with the intention of "looking him up" upon return.
Here is what I discovered about "the black slug also known as black arion, European black slug, or large black slug, Arion ater, is a species of large land slug, a terrestrial slug in the family Arionidae, the roundback slugs."
Or else I'll beat you, As black as coal.
Snail, snail, Put out your horns.
I'll give you bread, And barley corns."
(English Nursery Rhyme)