between 1660 and 1700, it has been calculated that 89, nearly a quarter, contained one or more roles for actresses in male clothes (see Howe). Practically every Restoration actress appeared in trousers at some time, and breeches roles would even be inserted gratuitously in revivals of older plays. Some critics, such as Jacqueline Pearson, have argued that these cross-dressing roles subvert conventional gender roles by allowing women to imitate the roistering and sexually aggressive behaviour of male Restoration rakes, but Elizabeth Howe has objected in a detailed study that the male disguise was "little more than yet another means of displaying the actress as a sexual object". The epilogue to Thomas Southerne's Sir Anthony Love (1690) suggests that it does not much matter if the play is dull, as long as the audience can glimpse the legs of the famous "breeches" actress Susanna Mountfort (also known as Susanna Verbruggen): You'll hear with Patience a dull Scene, to see, In a contented lazy waggery, The Female Mountford bare above the knee. Katharine Eisaman Maus also argues that as well as revealing the female legs and buttocks, the breeches role frequently contained a revelation scene where the character not only unpins her hair but as often reveals a breast as well. This is evidenced in the portraits of many of these actresses of the Restoration. Breeches roles remained an attraction on the British stage for centuries, but their fascination gradually declined as the difference in real-life male and female clothing became less extreme. They played a part in Victorian burlesque and are traditional for the principal boy in pantomime. Opera Historically, the list of roles that are considered to be breeches roles is constantly changing, depending on the tastes of the opera-going public. In early Italian opera, many leading operatic roles were assigned to a castrato, a male castrated before puberty with a very strong and high voice. As the practice of castrating boy singers faded, composers created heroic male roles in the mezzo-soprano range, where singers such as Marietta Alboni and Rosamunda Pisaroni specialised in such roles. (See Xerxes below.) Currently, all castrato roles are being reclaimed by men. As the training and use of countertenors becomes more common, there are more men with these very high voices to sing these roles. Casting directors are left with choices such as whether to cast the young Prince Orlofsky in Johann Strauss II's