Halvorsen’s 1894 violin and viola arrangement of the passacaglia from Handël’s Harpsichord Suite in G minor HWV 432 serves up a panoply of techniques, textures and moods over its 12 variations, then switches Handël’s own closing G minor chord to G major. Legend has it that Mozart wrote his sunnily virtuosic, three-movement G major violin and viola duo for Michael Haydn to pass off as his own when illness prevented him from completing a commissioned set of duos on time for the Archbishop of Salzburg. Dvořák had himself in mind as violist when in 1887 he penned his Terzetto for home music-making with two friends. Ultimately too demanding for the amateur violinist among them, its four movements include a scherzo third of folky furiant cross-rhythms, followed by an emotionally complex theme and variations finale. Chausson wrote his ravishing Poème in 1896 for Eugène Ysaÿe, who had requested a concerto. ‘I hardly know where to begin with a concerto,’ Chausson demurred. ‘But I can cope with a shorter work. It will be in very free form with many passages where the violin plays alone.’