Caolisport or Killisport, a seaboard district and a sea-loch in South Knapdale parish, Argyllshire. The district includes the peninsula and point of Knap, between Loch Sivin on the NW and Loch Caolisport on the SE. Loch Caolisport enters from the S end of the Sound of Jura; penetrates 6½ miles north-eastward, contracting gradually from a width of 2 miles to a point; includes several beautiful small bays; and affords safe anchorage. Its SE screen rises gradually into hill; its N W shore is rocky, abrupt, and bold; and both are richly clothed with copsewood. Achahoish hamlet lies at its head. 'The curious cave chapel,' says Skene, 'at Cove, on Loch Caolisport, which tradition says was Columba's first church in Scotland before he sailed to Iona, is probably connected with his residence with King Conall in 563.' It is 42 feet long, and contains an altar with a cross-calvary and an oval piscina.

(F.H. Groome, Ordnance Gazetteer of Scotland (1882-4); © 2004 Gazetteer for Scotland)