During the later Baroque period, Johann Sebastian Bach and George Frideric Handel used trombones on a few occasions. Bach called for a "tromba di tirarsi" to double the cantus firmus in some of his liturgical cantatas, which may be a form of the closely related slide trumpet. Bach also employed a choir of four trombones to double the chorus in three of his cantatas (BWV 2, BWV 21 and BWV 38), and also a quartet of three trombones and one cornett in the cantata BWV 25. Handel used it in the "Death March" from "Saul", "Samson", and "Israel in Egypt". All were examples of an oratorio style popular during the early 18th century. Score notations are rare because only a few professional "Stadtpfeiffer" or alta cappella musicians were available. Handel, for instance, had to import trombones to England from a Royal court in Hanover, Germany, to perform one of his larger compositions. Therefore, trombone parts were rather seldom given "solo" roles that were not interchangeable with other instruments.