The Burning Babe - Probably Southwell's most famous poem. With line numbers. At the University of Toronto English Library. - http://www.library.utoronto.ca/utel/rp/poems/southwel1b.html
I dye alive - Poem, in The Oxford Book of English Mystical Verse. - http://www.bartleby.com/236/4.html
Times go by Turns - Poem, with line numbers. From The Oxford Book of English Verse. - http://www.bartleby.com/101/108.html