The townland of Gosford Demesne is in the parish of Mullaghbrack in Armagh County.
The school within the desmesne was described in 1838 in the Ordnance Survey Memoirs:
PRONI records: D.1606/6A/1 (Working plan of Gosfort Demesne.C 1800); T.3323 (Photographs of castle and china porcelain.); D.1606 (Gosford correspondence re building materials for Gosford Castle.); D.1618/18/11 (Album of photographs of Armagh and Tyrone scenery including exterior of Gosford Castle.); D.1606/6A/3 (Rough map and elevation of intended approach to Gosford Castle.C 1834); D.1606/6A/4 (Rough plan of intended approach to Gosford Castle by Alex? Richmond.); D.1606/6A/5 (Plan and section of intended approach and back entrance to Gosford Castle, by Alex? Richmond.); D.3520 (Sale catalogue of contents of castle.); T.2437/1-2 (2 copies of sale catalogue.); D.603 (Survey.); OS/6/2/17/1 (Surveyed 1835. Engraved 1835.); OS/6/2/17/2 (Surveyed 1835. Engraved 1835. Revised 1860. Engraved 1863.); OS/6/2/17/3 (Surveyed 1835. Revised 1906. Published 1908. Reprinted 1929, 1932.); OS/6/2/17/4 (Surveyed 1906. Revised 1954-5. Levelled 1889, 1892 and 1906. Published 1958 (2 copies).); VAL/1B/213 (1st valuation records.); VAL/12B/10/34A, VAL/12B/10/34B, VAL/12B/10/34C, VAL/12B/10/34D (Valuation annual revision list.); VAL/2B/2/12A (Griffith valuation list.); D.2557 (Photographs of architectural details of Gosfort Castle.C 1968); T.1417 (Sale catalogue of furniture, etc.); T.1460 (Military billeting plans.); D.1664 (13 photographs.).