There are 8 titles associated with this person.

Howitt, Mary, and William Howitt. The Forest Minstrel, and Other Poems. By William and Mary Howitt. London: Baldwin, C. Cradock, and W. Joy, 1823.
Howitt, William, and Mary Howitt. The Desolation of Eyam: The Emigrant, A Tale of the American Woods, and Other Poems. By William and Mary Howitt, Authors of 'The Forest Minstrel, and other Poems.' London: William Curry, Jun. & Co., Wightman and Cramp, Thomas Oliver and George Boyd [High Street], 1827.
Howitt, William, and Mary Howitt. The Desolation of Eyam: The Emigrant, A Tale of the American Woods: And Other Poems. By William and Mary Howitt. Authors of "the Forest Minstrel and Other Poems." London: William Curry, Jun. & Co., Wightman and Cramp, Thomas Oliver and George Boyd [High Street], 1828.
Howitt, Mary, Barbara Hofland, Amelia Opie, Agnes Strickland, Maria J. Jewsbury, Cornelius Webbe, William Howitt, Emma Roberts, Nathaniel P. Willis, Miss Fry, Miss Trimmer, Miss Wood, Captain Macnaghten, Miss Atherstone, Maria Abdy, Eleanor L. Montagu, J.F. Hollings, Nugent Taylor, C.B. Wilson, Thomas Wright, Delta , James Montgomery, James Emerson, Thomas K. Hervey, William L. Bowles, Alaric Watts, Catherine G. F. Gore, Felicia Hemans, Mary R. Mitford, Derwent Conway, and Jeremiah H. Wiffen. The New Year's gift and juvenile souvenir. Edited by Mrs. Alaric Watts. London: Longman, Rees, Orme, Brown, and Green, Thomas Wardle, Longman, Rees, Orme, Brown, Green and Longman, 1829-1836.
Howitt, Mary, and William Howitt. The Book of the Seasons; or The Calendar of Nature. By William Howitt. London: Henry Colburn and Richard Bentley, 1831.
Shelley, Mary, W., John R. Chorley, Amelia G. Smyth, Felicia Hemans, William Howitt, Thomas Roscoe, W. H. Harrison, Mary Howitt, Andrew Norton, Hartley Coleridge, Francis Wrangham, Mary A. Browne, Reverend T. Raffles, H. C. Deakin, L. A. J. Mordacque, J. Merritt, John Bowring, W. G. Clarke, Gent Mark Spencer, Priscilla M. W. Watts, Ann Butler, Anne M. Moir, R. Millhouse, Catherine Parry, M. D. La Claverie, Signor Grimaldi, and Rose D. Lawrence. The Winter's Wreath for MDCCCXXXII. London: Whittaker, Treacher, and Arnot, George Smith, 1832.
Howitt, Mary, Emily Taylor, Unknown, Amelia Opie, Felicia Hemans, and William Howitt. The New Original Poems, for the Instruction of the Young. Collected by Clara Hall. Editress of "Affection's Offering," "Parlour Stories," &c. &c. With Fine Engravings. London: Edward Lacey, 1835.