Arthur Jacob D.D. was Archdeacon of Armagh from 1777 until his death in 1786."Fasti Ecclesiae Hibernicae: The succession of the prelates Volume 3" Cotton, H. p47/8 Dublin, Hodges & Smith, 1848–1878

Jacob was born in Kilkenny and educated at Trinity College, Dublin."Alumni Dublinenses : a register of the students, graduates, professors and provosts of Trinity College in the University of Dublin (1593–1860George Dames Burtchaell/Thomas Ulick Sadleir p434: Dublin, Alex Thom and Co, 1935 He held livings at Killane, Clonkeen and Killeavy He was Treasurer of Leighlin from 1765 to 1771;"Fasti Ecclesiae Hibernicae: The succession of the prelates Volume 2" Cotton, H. p396 Dublin, Hodges & Smith, 1848–1878 Precentor of Armagh Cathedral from 1771 to 1775;"Fasti Ecclesiae Hibernicae: The succession of the prelates Volume 3" Cotton, H. p38 Dublin, Hodges & Smith, 1848–1878 and Prebendary of Tynan in there from 1775 to 1778."Fasti Ecclesiae Hibernicae: The succession of the prelates Volume 3" Cotton, H. p56 Dublin, Hodges & Smith, 1848–1878

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