How old was Margaret Fuller when she became editor of the Dial?

The feminist writer Margaret Fuller was 30 when Ralph Waldo Emerson asked her to edit his Transcendentalist periodical in 1840.

During her life she also worked as the foreign correspondent for the New York Tribune and wrote the influential collection of essays, Woman in the Nineteenth Century (1845), which served as an inspiration for the Women’s Rights Convention at Seneca Falls, New York, in 1848.