He boards the ship home, along with about twenty surviving Pendle witches led by Grimalkin. A grimalkin (or greymalkin) is an old or evil-looking female cat. Tom runs for hours and is almost home when Grimalkin catches up to him. A grimalkin (also called a greymalkin) is an archaic term for a cat. Nostradamus, the French prophet and astrologer, 15031566, had a cat named Grimalkin. Tom returns home a few days later to find Grimalkin in his yard. He sentences Sham, Agba, and Grimalkin to life in Wicken Fen, and they depart. Although Grimalkin was abandoned at sea, she was later salvaged afloat and still sails. Grimalkin is the best character in physical limits and has battle smarts. As he turns to run, Grimalkin hurls a blade at him.