 "Arc de Triomphe" (1943), a musical vehicle for Mary Ellis, was only a modest success, but "Perchance to Dream" (1945) was immensely successful, running for 1,022 performances.In between the two shows, Novello had been in serious legal trouble and served four weeks in prison for misuse of petrol coupons, a serious offence under rationing laws in wartime Britain.An admiring fan had stolen the coupons from her employer, but the court found that Novello was also culpable.