These essays by leading scholars of early modern attribution, editing, theater, and versification (including Andrew Gurr, Gary Taylor, and Brian Vickers) focus on questions of authorship, authority, and ownership in Marlowe, Peele, Shakespeare, Middleton, Webster and others. Some essays take MacDonald P. Jackson's pioneering work in these fields a stage further, by looking at the critical consequences; others develop new methods, principles, or theoretical positions in determining authorship; still others use new data to extend or challenge Jackson's findings. Brian Boyd is University Distinguished Professor in the English Department at the University of Auckland.