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[Illustration: ANCIENT IRELAND, shewing the Ancient Schools and Principal
Territorial Divisions before the Anglo-Norman Invasion.

_Sealy, Bryers & Walker, Lith., Dublin._]




  INSULA SANCTORUM ET DOCTORUM

  OR,

  IRELAND'S ANCIENT SCHOOLS AND SCHOLARS


  BY THE MOST REV. JOHN HEALY, D.D., LL.D., M.R.I.A.,
  BISHOP OF CLONFERT; COMMISSIONER FOR THE PUBLICATION
  OF THE BREHON LAWS; EX-PREFECT OF THE DUNBOYNE
  ESTABLISHMENT, MAYNOOTH COLLEGE.


  SIXTH EDITION.


  DUBLIN:
  SEALY, BRYERS & WALKER,
  86 MIDDLE ABBEY STREET.
  M. H. GILL & SON,
  50 UPPER O'CONNELL STREET.
  LONDON: BURNS & OATES, LIMITED,
  28 ORCHARD STREET, W., AND 63 PATERNOSTER ROW, E.C..
  NEW YORK, CINCINNATI AND CHICAGO:
  BENZIGER BROTHERS.

  1912.




  PRINTED BY
  SEALY, BRYERS AND WALKER,
  MIDDLE ABBEY STREET,
  DUBLIN.




PREFACE TO THE FOURTH EDITION.


Some smaller inaccuracies in the previous Editions have been corrected in
this Edition; but no other changes have been made.

  [Cross Pattee] JOHN HEALY, D.D.,
    Bishop of Clonfert.

  MOUNT