this fatwa is also in his fatawa 'al-ataya al-ridawiyyah fi al-fatawa al-hashmatiyyah' which has been published.
قہر واجد دیان بر ہمشیر بسط البنان از شیر بیشہء اہل سنت مولانا حشمت علی خان بریلوی http://www.scribd.com/doc/138344078/qahr-e-wajid-dayan