In the spring of 1865, after having received some instruction from the veteran actor
John Ryder, she appeared at
Sarah Thorne's Theatre Royal (
Margate), long a training-school for novices, where she made a favourable impression. In 1865, at Theatre Royal (
Margate), she appeared as Julia in
The Hunchback, a character with which her name was long to be associated. For the next few years, she played at London and provincial theatres in various roles, including
Rosalind,
Amy Robsart and
Rebecca (in
Ivanhoe),
Beatrice,
Viola and
Isabella (in
Measure for Measure). In July 1865 she was brought out at the New Royalty Theatre, London, in the character of
Juliet. Her achievement was not considered extraordinary, but it attracted some favourable attention, and she was able to continue with acting. She was a part of a production of
The Huguenot Captain by Watts Phillips given by the Princess Theatre on 2 July 1866. Neilson played the role of the heroine
Gabrielle de Savigny. In November 1866 she received favourable reviews for her portrayal of
Victorine, another character in
The Huguenot Captain. This time the play was performed at the
Adelphi Theatre. She also played
Nelly Armroyd, in
Lost in London. Phillips was pleased with her acting; so was the critic
Joseph Knight and the dramatist
John Westland Marston; and all of them promoted her career. In 1868 she had become an experimental travelling star, acting
Rosalind, Bulwer's
Pauline, and Knowles'
Julia; but she was not successful at first, and during the next three or four years she took a variety of jobs, sometimes acting in metropolitan stock companies, and sometimes taking better positions. One of the expedients that she early adopted was that of a dramatic recital, given at St. James' Hall, London. Long afterwards she repeated that recital in
America, with brilliant effect. Some of the parts that she played, at various London theatres, were: Lillian, in Dr Marston's
Life for Life;
Madame Vidal, in
A Life Chase, by
John Oxenford and
Horace Wigan; and
Mary Belton, in ''Uncle Dick's Darling''. In 1870 she gained a conspicuous success as the eponymous heroine
Amy Robsart, a part that suited her well, in a new play adaptation of
Sir Walter Scott's novel
Kenilworth by
Andrew Halliday; and in 1871 she obtained critical admiration as Rebecca, in a play based on Sir Walter Scott's
Ivanhoe. ==American stage==