[1] In medieval times the McGovern barony of Tullyhaw was divided into economic taxation areas called ballibetoes, from the Irish Baile Biataigh (Anglicized as 'Ballybetagh'), meaning 'A Provisioner's Town or Settlement'.
[8] The McGovern lands in Porturlan were confiscated in the Cromwellian Act for the Settlement of Ireland 1652 and were distributed as follows- The 1652 Commonwealth Survey lists the proprietor of Killecrooghan as John Boyd.
A grant dated 30 January 1668 was made from King Charles II of England to Mary Boyd for the 34 acres and 6 perches in the parts of ye cartron of Kilcrohan at an annual rent of nine shillings and twopence farthing.
[10] A grant dated 30 January 1668 was made from King Charles II of England to William Chambers for 20 acres 2 roods and 27 perches in Porturlan alias Killcroghan at an annual rent of fourteen shillings and sixpence.
[10] A grant dated 9 September 1669 was made from King Charles II of England to Arthur Annesley, 1st Earl of Anglesey, for 27 acres in the south part of Killerachan at an annual rent of seven shillings and threepence halfpenny and for 17 acres and 3 perches in the northwest part of Killerachan at an annual rent of four shillings and seven pence.
[20] The book Bawnboy and Templeport History Heritage Folklore by Chris Maguire gives the following description of the school- Porturlan National School.
Principal Teachers- Michael Heery (1899- ); James Wrynn (circa 1926); Patrick Kelly ( ); Mr. Fleming (-1937-); Mrs. E. Tiernan (1937-'50); Séamus Maguire (1950-'54); Máirtín McGowan (1954-'68).
Assistants Teachers- Kate Beatty; Rose Maguire; Nuala Waldron; Lily Flanagan; Margaret Mulligan; Betty Reynolds.