Royal Horticultural and Arboricultural Society of Ireland
Rowallane, County Down
Shaw's Corner, Hertfordshire (Accredited Museum)
Patrick Rogers
Sissinghurst Castle Garden, Kent (Accredited Museum)
Ruth Isabel Ross
Greys Court, Oxfordshire (Accredited Museum)
L. J. Ransone
Ordnance Survey (Ireland)
Thomas Prior (1682-1751)
Stourhead, Wiltshire (Accredited Museum)
Robin F. Haines
Wallington, Northumberland (Accredited Museum)
T. D. Sullivan (1827-1914)
Wightwick Manor, West Midlands (Accredited Museum)
Henry Harrison (b.1867)
Gwynn, Stephen, Mrs
Mount Stewart, County Down (Accredited Museum)
Francis Ryan Montgomery Hitchcock
Ormesby Hall, Redcar and Cleveland (Accredited Museum)
Springhill, County Londonderry (Accredited Museum)
Plas Yn Rhiw, Gwynedd (Accredited Museum)
Q. Furnace
Hatchlands Park, Surrey (Accredited Museum)
Albert Stöckl (1823-1895)
James Gibson
Castle Coole, County Fermanagh
John Heaney
East Riddlesden Hall, West Yorkshire (Accredited Museum)
James Henry Lynch (fl.1815 - d.London 1868).
François-David Soiron (b.Geneva 1764)
Uppark House and Garden, West Sussex (Accredited Museum)
William Gibson
Quebec House, Kent (Accredited Museum)
James Clarence Mangan (1803-1849)
William Clarke (1709-1760)
Dorneywood House and Gardens, Buckinghamshire
Gilbert Burnet (1697 or 8-1746) Vicar of Coggeshall
Castle Ward, County Down (Accredited Museum)
Henry Bussell
Church of Ireland
Michael John Fitzgerald McCarthy
Thomas Paul Lefroy (1806-1891)
Edmund Thomas Bewley (1837-1908)
possibly Williams and Gibton
Kearney
Jonathan Fisher (fl. Dublin 1763 - Dublin 1809)
Francis Wheatley, RA (London 1747 – London 1801)
Charles Chambers
James Marshall Leckie
Baddesley Clinton, Warwickshire (Accredited Museum)
Dudley Loftus (1619-1695)
Lanhydrock, Cornwall (Accredited Museum)
