Under the auspices of Charles Hart, Nelly made her first appearance at the (King's) theatre, in a serious part, Cydaria, in the "Indian Emperor." She was then not more than fifteen, though some say seventeen years of age. For tragedy she was unfitted: her stature was low, though her figure was graceful; and it was not till she assumed comic characters, stamped the smallest foot in England on the boards, and laughed with that peculiar laugh that, in the excess of it, her eyes almost disappeared, she fairly carried away the town, and enslaved the hearts of city and of court. She spoke prologues and epilogues with wonderful effect, danced to perfection, and in her peculiar but not extensive line was, perhaps, unequalled for the natural feeling which she put into the parts most suited to her. She was so fierce of repartee that no one ventured a second time to allude sneeringly to her antecedents. She was coarse, too, when the humour took her; could curse pretty strongly if the house was not full, and was given, in common with the other ladies of the company, to loll about and talk loudly in the public boxes, when she was not engaged on the stage. She left both stage and boxes for a time, in 1667, to keep mad house at Epsom with the clever Lord Buckhurst--a man who for one youthful vice exhibited a thousand manly virtues. The story, that Lord Buckhurst separated from Mistress Gwyn for a money consideration and a title, can be disproved by the testimony of a character which all Peru could not have influenced, and of chronology, which sets the story at nought.
They who would read Buckhurst's true character, will find it in the eloquent and graceful dedication which Prior made of his poems to Buckhurst's son, Lionel. Like the first Sackville, of the line of the Earls of Dorset, he was himself a poet; and, "To all you ladies now on land," although not quite the impromptu it is said to have been, is an evidence how gracefully he could strike the lyre on the eve of a great battle. In short, Buckhurst, who took Nelly from the stage, and who found Prior in a coffee-shop and added him to literature, was a "man," brave, truthful, gay, honest, and universally beloved. He was the people's favourite; and Pope assures us, when Buckhurst had become Earl of Dorset, that he was "the grace of courts, the muses' pride."