Bergin 2009, [1st paragraph, 1st sentence]. "Preston, Nicholas (c.1608–43), 6th Viscount Gormanston" Bergin, John (October 2009). McGuire, James; Quinn, James (eds.). "Preston, Nicholas". Dictionary of Irish Biography. Retrieved 16 January 2022.
Bergin 2009, [3rd paragraph, last sentence]. "Two daughters of the 6th viscount were granted £20 p.a. each out of their father's estate in 1654." Bergin, John (October 2009). McGuire, James; Quinn, James (eds.). "Preston, Nicholas". Dictionary of Irish Biography. Retrieved 16 January 2022.
House of Lords 1779, p. 2, left column. "Die Lunae 14° Julii, Anno Regn. Dni Caroli 10°, Annoq; Dni 1634° ... The Viscount Gormanstown, with the like Writ, brought in by the Earl of Westmeath and the Baron of Trimbleston." House of Lords (1779). Journals of the House of Lords(PDF). Vol. I. Dublin: William Sleater. OCLC35009219. Retrieved 17 January 2022. – 1634 to 1699
House of Lords 1779, p. 100, left column. "Die Mercurii, 18° Martii, 1639° ... Present ... Nicholas Viscount of Gormanstown" House of Lords (1779). Journals of the House of Lords(PDF). Vol. I. Dublin: William Sleater. OCLC35009219. Retrieved 17 January 2022. – 1634 to 1699
House of Lords 1779, p. 2, left column. "Die Lunae 14° Julii, Anno Regn. Dni Caroli 10°, Annoq; Dni 1634° ... The Viscount Gormanstown, with the like Writ, brought in by the Earl of Westmeath and the Baron of Trimbleston." House of Lords (1779). Journals of the House of Lords(PDF). Vol. I. Dublin: William Sleater. OCLC35009219. Retrieved 17 January 2022. – 1634 to 1699
House of Lords 1779, p. 100, left column. "Die Mercurii, 18° Martii, 1639° ... Present ... Nicholas Viscount of Gormanstown" House of Lords (1779). Journals of the House of Lords(PDF). Vol. I. Dublin: William Sleater. OCLC35009219. Retrieved 17 January 2022. – 1634 to 1699