David Rhys Williams wrote about what theory that Marlowe was the author of Shakespeare plays?
Marlovian theory of Shakespeare authorship The Marlovian theory of Shakespeare authorship holds that the Elizabethan poet and playwright Christopher Marlowe was the main author of the poems and plays attributed to William Shakespeare. Rather, the theory says Marlowe did not die in Deptford on 30 May 1593, as the historical records state, but that his death was faked.
World Shakespeare Bibliography World Shakespeare Bibliography Online is a searchable electronic database consisting of the most comprehensive record of Shakespeare-related scholarship and theatrical productions published or produced worldwide between 1960 and the present. Containing over 146,000 annotated entries, this collected information provides annotated citations for anyone engaged in research on William Shakespeare or Early Modern Britain. It is the single-largest Shakespeare database in the world.