- Livre électroniqueOliver Cromwell and the Rule of the Puritans in England (Barnes & Noble Digital Library)Charles Harding Firth
- Livre électroniqueCromwell's Army (Barnes & Noble Digital Library)Charles Harding Firth
- Livre électroniqueThe Last Years of the Protectorate 1656-1658, Volume 2 (Barnes & Noble Digital Library)Charles Harding Firth