Sale August 1867, by Mr. Hall, Engineer, Liverpool, Liquidator, of Rossmore Slate Company Limited, Durrus, West Cork.

Lease of 60 years from Bandon estate from 1863 with approx 1,300 acres at Ardnamanagh, Schull.

The remnants of the quarry are still visible.
https://durrushistory.com/2015/06/10/rossmore-slate-quarry-abuting-dunmanus-bay-durrus-west-cork-operating-from-around-1866/
https://durrushistory.com/2014/06/10/19th-century-mines-and-quarries-rossmore-and-friendly-cove-slate-quarries-durrus-copper-clonee-scart-bantry-barytes-rooska-and-killoveenogue-silver-and-lead-mine-west-cork/