The townland of Lisnisk is in the parish of Loughgilly in Armagh County. It is labelled number 36 on the map.
The Environment and Heritage Service Sites and Monuments Record (2002) notes the following in this townland:
Enclosure of uncertain period
SMR NO: ARM 017:028
GRIDREF: J01023750
CONDITION: NO VISIBLE REMAINS
"A "Fort" is marked on the 1835 OS 6" map, whilst the revision of 1863 records an undesignated circular earthwork c.40m in diam. The site was located a little to the W of the summit of a small drumlin but no trace survives. "
PRONI records: D.1166 (Title deeds to lands, Stewart family.); 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/219 (1st valuation records.); VAL/12B/15/19E, VAL/12B/15/23A, VAL/12B/15/23B, VAL/12B/15/23C, VAL/12B/15/23D, VAL/12B/15/23E (Valuation annual revision list.); VAL/2B/2/34A (Griffith valuation list.).