I'm a NZ cacher and lifetime Tolkien fan (last book I read was Beren and Luthien / The Lay of Leithian / Release from Bondage ). I have the required info for the Wisconsin cache from below the Angel (unfortunately not The Angel, Islington which would have also ticked the Neil Gaiman / Neverwhere box ). Contact me if you want to become part of The Fellowship for this cache.
Namarië,
tryfyn