In 1892 John Morrison bought the estate and the farm Knock. A water source was later found on the southern part of the estate. Morrison had this water tested at a company in Edinburgh and it turned out to be of very good quality for the production of whisky. The 5% whisky marketed by the Knockdhu distillery as Single Malt under the name An Cnoc is matured in refill- and bourbon casks. The quality of this Single Malt is constant and balanced.