Later that year Alan Rawsthorne 's Carmen Vitale was a choral commission ; .
At the beginning of 1963 the Society faced one of its greatest challenges , a new work by Hans Werner Henze called Novae de Infinito Laudes .
Later that year Alan Rawsthorne 's Carmen Vitale was a choral commission ; and at the beginning of 1963 the Society faced one of its greatest challenges , a new work by Hans Werner Henze called Novae de Infinito Laudes .