The Northern Earls were losing money due to the religious settlement and were influenced by their wives, planning to create an uprising in the North, capture Hartlepool port for Spanish troops' help, meet Norfolk to kill Elizabeth and place Mary on the throne
During the Revolt of the Northern Earls, they ordered their men to join them, charged into Durham Cathedral destroying Protestant prayer books and English Bibles, overturned the communion table, and celebrated Catholic mass in Latin