Manchester. _Boom_ (Vol. vii., p. 620.; Vol. viii., p. 183.).--The Bittern is not an uncommon bird in some parts of Wales, where it is very expressively called _Aderyn-y-Bwn_ (the Boom-bird), or _Bwmp-y-Gors_ (Boom of the Fen): the _w_ is pronounced as double _o_.