During this period, Williamson is often recorded on playbills as acting alongside her.
As Mrs Barresford, she performed in Edinburgh between 1789 and 1791.
She was nearing the end of her life and was perhaps already ill, but she was apparently working regularly, and still received praise from the manager, Jackson: 
"How admirably Mr King is supported by Mrs Barresford's performance – her merits as an actress are universally allowed; and, for my own part, I cannot say that ever I saw her in any character she did not support according to my most sanguine expectations.
Mr King's Sir Peter, and her Lady Teazle, was as complete a piece of acting as one could see within the walls of a Theatre." (
Caledonian Mercury, 1789)
 
In 1789 she was in The Clandestine Marriage and The Citizen.
She played in The English Merchant by George Colman, The Pannel and The Heiress.
She was in All in the Wrong by Arthur Murphy, English Merchant by George Colman, The Beaux' Stratagem, The Critic, and The Pannel.
In 1790 she played Hippolyta in The Tempest, Fatima in Cymon, Lady Gayville in The Heiress, Lady Lardoon in the farce The Maid of the Oaks which included the Williamson and Barresford minuet, The Brothers, Three Weeks After Marriage, and she spoke the epilogue to Vimonda by Andrew Macdonald.
In 1791 she played Lady Macbeth for the first time, and at the end of the play danced a minuet with Mr Aldridge.
On the same night she played a fine lady in the farce Lethe, or Aesop in the Shade by David Garrick.
She appeared in I'll Tell You What by Elizabeth Inchbald, and in The Miser.
She played the Queen in Hamlet, and was in the farce Three Weeks After Marriage again, The Fashionable Lover with her usual minuet, and Tit For Tat by Charlotte Charke.
She was engaged for the 1792 season, but it is not known whether she performed that year.
During this period, Williamson is often recorded on playbills as acting alongside her. As Mrs Barresford, she performed in Edinburgh between 1789 and 1791. She was nearing the end of her life and was perhaps already ill, but she was apparently working regularly, and still received praise from the manager, Jackson: 
"How admirably Mr King is supported by Mrs Barresford's performance – her merits as an actress are universally allowed; and, for my own part, I cannot say that ever I saw her in any character she did not support according to my most sanguine expectations. Mr King's Sir Peter, and her Lady Teazle, was as complete a piece of acting as one could see within the walls of a Theatre." (Caledonian Mercury, 1789)
 
In 1789 she was in The Clandestine Marriage and The Citizen. She played in The English Merchant by George Colman, The Pannel and The Heiress. She was in All in the Wrong by Arthur Murphy, English Merchant by George Colman, The Beaux' Stratagem, The Critic, and The Pannel. In 1790 she played Hippolyta in The Tempest, Fatima in Cymon, Lady Gayville in The Heiress, Lady Lardoon in the farce The Maid of the Oaks which included the Williamson and Barresford minuet, The Brothers, Three Weeks After Marriage, and she spoke the epilogue to Vimonda by Andrew Macdonald. In 1791 she played Lady Macbeth for the first time, and at the end of the play danced a minuet with Mr Aldridge. On the same night she played a fine lady in the farce Lethe, or Aesop in the Shade by David Garrick. She appeared in I'll Tell You What by Elizabeth Inchbald, and in The Miser. She played the Queen in Hamlet, and was in the farce Three Weeks After Marriage again, The Fashionable Lover with her usual minuet, and Tit For Tat by Charlotte Charke. She was engaged for the 1792 season, but it is not known whether she performed that year.
Mary Bulkley