There are 3 titles associated with this person.

Downing, Harriet. Mary; or, Female Friendship: A Poem, in Twelve Books. By Harriet Downing. London: James Malcott Richardson, Thomas and Joseph Allman [Princes St], James Harper and Co. [London], 1816.
Downing, Harriet. The Child of the Tempest; and Other Poems. By Harriet Downing. London: J. Harwood, 1821.
Downing, Harriet. The Bride of Sicily. A Dramatic Poem, by Harriet Downing. London: Thomas Hurst, Edward Chance, and Co., John Sams, 1830.