This set of four works, all in minor keys, is unique for the energy of the fugal writing, the passionate chromaticism of the slow movements and the playful, asymmetrical phrasing of the final Minuets. The scoring leaves open a range of performance possibilities, from one to a part with or without continuo (following the varying density of figured bass and the instruction “senza cembalo”) to orchestral performance as suggested by the English Concerto arrangements.