This unrivalled actress, born in 1755, was, like her brother John Kemble, led upon the boards at a very early age; so young indeed was she, that the rustic audience, offended at her infantile appearance, began to hoot and hiss her off, when her mother Mrs Kemble, herself an actress, led her to the front of the stage, and made her repeat the fable of the boys and the frogs, which she did in such a manner as appeased the critics, and insured a favourable reception for her ever after. In her eighteenth year, she married Mr Siddons, an actor in her father's company; and the young couple soon after took an engagement to act at Cheltenham. "At that time," says Mr Campbell, "the Hon. Miss Boyle, the daughter of Lord Dungarvon, a most accomplished woman, and authoress of several pleasing poems, one of which, an "Ode to the Poppy," was published by Charlotte Smith, happened to be at Cheltenham. She had come accompanied by her mother and her mother's second husband, the Earl of Aylesbury. One morning that she and some other fashionables went to the box-keeper's office, they were told that the tragedy to be performed that evening was "Venice Preserved." They all laughed heartily, and promised themselves a treat of the ludicrous in the misrepresentation of the piece. Some one who overheard their mirth, kindly reported it to Mrs Siddons. She had the part of _Belvidera_ allotted to her, and prepared for the performance of it with no very enviable feelings. It may be doubted whether Otway had imagined in _Belvidera_ a personage more to be pitied than her representative now thought herself. The rabble in "Venice Preserved" showed compassion for the heroine; and when they saw her feather-bed put up to auction, "governed their roaring throats, and grumbled pity." But our actress anticipated refined scorners more pitiless than the rabble, and the prospect was certainly calculated to prepare her more for the madness than the dignity of her part. In spite of much agitation, however, she got through it. About the middle of the piece, she heard some unusual and apparently suppressed noises, and therefore concluded that the fashionables were in the full enjoyment of their anticipated amusement, tittering and laughing, as she thought, with unmerciful derision.