Galendrill shakes his head negatively. "No. I've not actually seen our new friend directly. It's more a sense of motion...a fleeting movement about a block or so behind us. I've noticed it several times now...just outside your shop before here. Perhaps it's just paranoia. I've sent Alradur to tail us and see if he can get a better look at the culprit."
"As for an invisibility spell, no, I've none memorized."