House of Aviz
The work comprised, in part, analysis of around 14 succession candidates, in terms of five lineages with royal pretensions (including the House of Aviz). It put into play the succession to the English throne, by suggesting that elective monarchy, rather than hereditary monarchy, was a more appropriate way to address the succession issue. That approach was rebutted in most of the subsequent tracts. Genealogical content was supplied by William Allen and Sir Francis Englefield.