Pope Paul V
Following the death of George Birkhead in 1614, Harrison was appointed archpriest of England by Pope Paul V on 23 February 1615. His brief was dated 11 July 1615. Besides the usual faculties, Pope Paul V granted to Harrison "Facultates pro archipresbytero Angliæ, in regnis Angliæ, Scotiæ, Hiberniæ, Monæ, et aliis locis dominii regis Magnæ Britanniæ, ac pro personis eorundum regnorum et dominiorum tantum" on 23 July 1615.