To date, the only item of his work is a copy of Cúirt an Mheán Oíche ('the Midnight Court') by the Co. Clare poet, Brian Merriman, composed about 1780.
Both dialects are now extinct, with Ó hOrchaidh's manuscript one of the last featuring Connacht orthography and vocabulary and how Irish was pronounced in east Co. Galway and south Co. Roscommon (see Uí Maine), rendering its value quite high.
Ó hOrchaidh wrote it in 1817 in An Bhearaidh Bheag (Barry Beg) townland, Kiltoom parish, west of Lough Ree and Athlone.
With translation, his scribal note at the end of the text reads: Crioch le Cúirt an Meón áoighthe liomsa.
And finished on the third day of May in the year of the Holy Lord, God of Glory, May 3rd 1817.The surname is now rendered O'Hora, or Hore.