 By March 1605 Christopher had joined the conspiracy as well, but in October that year, as the plan was nearing its culmination, its existence was revealed to the authorities by an anonymous letter delivered to William Parker, 4th Baron Monteagle, warning him to stay away from Parliament.Uncertain of its meaning Monteagle delivered the letter to the English Secretary of State, Robert Cecil, 1st Earl of Salisbury.Monteagle's servant was closely related to Christopher's wife, Margaret, and thus the plotters soon became aware of its existence.