grundy was such a prominent figure that richard wagner visited him at his kilburn home during his 1877 london visit and wrote enthusiastically about grundy 's jackdaw of rheims to his father-in-law liszt , who , on his last visit to london in 1886 , visited `` that charming and imaginative ( composer ) joshua grundy '' to play his `` variations on the jackdaw theme '' ( a series of 42 variations for piano , now , unfortunately , lost ) .