Fenner's Cabin and Plantation Songs, in Hampton and its Students also is on line through DocSouth, Univ. North Carolina: Cabin Plantation This takes you directly to the spiritual songs. (http://docsouth.unc.edu/church/armstrong/armstrong.html#ham171)

The Making of America compilation at U. Michigan duplicates a number of books already on line from other sources. One wonders if some items will be withdrawn in the future from one source or the other in order to avoid duplication and cut costs. In some cases, the alternate source is easier to locate and peruse.

Apparently making a Boolian search takes some care in refining. A search on "poetry," "English" brought up 4072 records- apparently poetic fragments in works on history, etc., are included.

"Poetical works" and "English" brought up 338 titles. Again, some are works on history, etc. with poetic fragments, arrangement not alphabetical, but noted were:
Burns, Robert, The Poetical Works, 1855 (with original pieces from Brydges and correspondence, etc., edited by Cunningham).
Burns, Robert, Ther poetical Works, 1859, with additions not in Currie's edition.
Campbell, Thomas, 1855, Complete Poetical Works.
Byron, George Gordon, three volumes inc. two of poems and Childe Harold....
De Quincy, Thomas, 1853, Essays on the Poets, copies of his other writings.
Carleton, Will, 1886, City Ballads.
Child- The edition of 1860 noted by Masato, but the 1864 edition also is available.
Butler, Samuel, 1857, Poetical Works.
McSherry, Richard, 1850, "El Puchero, or a Mixed Dish from Mexico...Scott's Campaign..." May have poems and songs of the Mexican War period.
Thomas Hood poems, Hugh Miller (Scotland) works,
and so on---

I am copying this list for further foraging.