Question: Which castle located in West Loch Tarbert is a large private country house?

Context paragraphs:
Kennacraig: Kennacraig (Scottish Gaelic: "Ceann na Creige" ) is a hamlet situated on West Loch Tarbert, a few miles south of Tarbert on the Kintyre peninsula, Argyll and Bute, West of Scotland. .

Soay Beag: Soay Beag (Scottish Gaelic: "Sòdhaigh Beag") is a small, uninhabited tidal island in West Loch Tarbert, between the northern and southern parts of Harris.  Soay Beag is separated from the southwest coast of North Harris by the Soay Sound.  The island is located immediately to the northwest of the larger Soay Mòr, which is accessible on foot at low tide.  Soay Beag's highest elevation is 37m (121 feet).

Tarbert, Argyll and Bute: Tarbert (Scottish Gaelic: "An Tairbeart" , ] , or "Tairbeart Loch Fìne" to distinguish it from other places of the same name) is a village in the west of Scotland, in the Argyll and Bute council area.  It is built around East Loch Tarbert, an inlet of Loch Fyne, and extends over the isthmus which links the peninsula of Kintyre to Knapdale and West Loch Tarbert.  Tarbert had a recorded population of 1,338 in the 2001 Census.

East Loch Tarbert, Argyll: East Loch Tarbert, Argyll is a small sea loch on the eastern side of the Kintyre peninsula in Scotland.  It is a part of the much larger Loch Fyne.  The village of Tarbert lies along the shores of the loch, which is separated from West Loch Tarbert by an isthmus only 1.5 km long.

West Loch Tarbert, Argyll: West Loch Tarbert, Argyll is a long and narrow sea loch on the western side of the Kintyre peninsula in Scotland.

Eilean Ceann na Creige: Eilean Ceann na Creige is a small island near Kennacraig in West Loch Tarbert in Scotland.  "Ceann na Creige" is Gaelic for "head of the rock".

Amhuinnsuidhe Castle: Amhuinnsuidhe Castle is a large private country house on the Isle of Harris, one of the Western Isles of Scotland.

PS Pioneer (1905): PS "Pioneer" was built by A. & J. Inglis, Pointhouse, Glasgow, and launched on 2 February 1905 for the David MacBrayne Ltd fleet.  She was built for the Islay mail service from West Loch Tarbert and commenced duties in April 1905, having achieved a satisfactory 14 knots on her trials.  She was of a light design, enabling her to reach West Loch Tarbet pier during the light spring tides.  As a result of this her paddle wheels were small, and her paddle boxes did not protrude above the promenade deck.  In March 1937 she lost the use of her starboard paddle wheel during heavy seas off MacArthur Head and drifted towards rocks.  Whilst the Port Askaig lifeboat and two of the company's other steamers stood by, she was able to proceed after running repairs were made.  In 1939 she moved to Oban for the summer.  She did not see active service during the Second World War but was laid up at the end of 1943.  She was later purchased by the Admiralty for experimental work and was also used as a floating laboratory in Portland Harbour on the South Coast.  She was finally scrapped at Rotterdam in 1958.

Tarbert Castle: Tarbert Castle is located on the southern shore of East Loch Tarbert, at Tarbert, Argyll, Scotland, at the north end of Kintyre.  Tarbert Castle was a strategic royal stronghold during the Middle Ages and one of three castles at Tarbert.  The castle overlooks the harbour and although pre 14th century in construction, the tower dates back to 1494 and the visit of James IV to the Western Highlands.

West Loch Tarbert: West Loch Tarbert (Scottish Gaelic: "Loch A Siar" ) is a sea loch that separates the northern and southern parts of the island of Harris in the Outer Hebrides of Scotland.  A small isthmus joins these two areas, on which is to be found the village of Tarbert.  The loch contains the islands Soay Mòr, Soay Beag and Isay, while Taransay lies near the mouth of the loch.  Amhuinnsuidhe Castle is located on the northern shore of the loch.

Supporting paragraphs: West Loch Tarbert Amhuinnsuidhe Castle
Answer: Amhuinnsuidhe Castle