I just did a google search for a book I read years ago I can’t remeber the name but thought it was Melancholia on the English stage.
Anyway I came across this it was the first hit for the search term.
For these critics, Smith’s theatricality emerges in her literary ventriloquism of other writers’ voices, in her public dramatization of her private woes, and in her staged appeal to the sympathies of the reader. Shifting this discussion of Smith in order to focus on her speaker’s melancholia, I suggest here that the sorrow of Smith’s poetic persona generates and is generated by the theatricality of the persona’s poetic productions.
Kathyrn Pratt, Charlotte Smith’s Melancholia on the Page and the Stage