sentences:  The purpose of this plot, she argued, was to undermine Walter Raleigh, whose activities supposedly interfered with Walsingham's covert machinations to make England a Protestant world power at the expense of Spain and other Catholic nations.This conspiracy would have prevented Raleigh and White from dispatching a relief mission until Walsingham's death in 1590.Miller also suggested that the colonists may have been Separatists, seeking refuge in America from religious persecution in England.