The thought of some future scholars scrutinizing her juvenilia might have seemed even more unimaginable after she received a letter in 1837 from poet laureate Robert Southey (the twenty-one year old had written to him for advice about her poems), where he tells her that:
Literature cannot be the business of a woman's life: & it ought not to be. The more she is engaged in her proper duties, the less leisure she will have for it, even as an accomplishment & a recreation. To those duties you have not yet been called, & when you are you will be less eager for celebrity.
Brontë later explained that she and her sisters "had a vague impression that authoresses are liable to be looked on with prejudice" -- an unsurprising view for the age, and one which must have been particularly driven home by the poet laureate's letter. But in 1837 Southey did not expressly tell her to stop writing, and she was still as prolific (maybe even compulsive?) a writer as she had been as a teen. Her writing became her means of support, but she clearly wrote for more than that and the volume of her work from such a young age suggests to me that she was driven by that inexplicable itch to put pen to paper. In any case, we are lucky that she did not take heed to Southey's hints, and ten years later the ever-determined Brontë published Jane Eyre, albeit under the ambiguously gendered pen name Currer Bell.