Also of note is the sefer “hador vehatekufah” written by rav elyakim shclesinger, rosh yeshiva in lucern. He writes that rabbi kook became known as a “kailiker”, a kal-person, not so frum, who was into secular philosophy and was chased out of his rabbinic post in Lita, and then found a job in england. He writes what many gedolim said about him, including rav chaim brisker.
