Finding a particular writer:
Search OneSearch for a poet's name, not the title of a poem. Generally, individual poems are not listed in the library catalog, so instead look for a collection of works by a poet or a poetry anthology (a collection of poems by several authors).
Finding a specific poem:
First find the name of the poet. You can usually Google the title of the poem or a line of text if you don't know the name, though you might have to add "poem" to the search. Once you know the poet's name you can search as above for a collection of works with that particular poem by that poet.
Finding an anthology:
An anthology is a collection of poems by different poets. To find them in OneSearch, try using a key word search with the terms poetry anthologies, poetry collections, English Poetry 19th century, etc.
Need help? Contact a librarian.