Mesolithic worked flint. A very heavy-bladed flint point, about 80mm overall and of later Mesolithic type, was found at the junction of the Trollaby River and the River Dhoo in 1985 and reported to LS Garrad (Manx Museum 1964-96).

Modern watermill. The Ordnance Survey 1:2500 First Edition mapping of 1867-8 depicts a water mill at this location, annotated as 'T. Mill'.

Modern watermill. The Ordnance Survey 1:2500 First Edition mapping of 1867-8 depicts a water mill at this location, annotated as 'T. Mill'. The mill has been converted for residential use.

Modern weir. The Ordnance Survey 1:2500 First Edition mapping of 1867-8 depicts a water mill at this location, annotated as 'T. Mill'. Water to power the mill was led off the River Glass via a weir and leat. The weir has been replaced by a modern structure in almost exactly the same position.

Modern mill leat. The Ordnance Survey 1:2500 First Edition mapping of 1867-8 depicts a water mill at this location, annotated as 'T. Mill'. Water to power the mill was led off the River Glass via a 200m long leat running along the west bank of the river. The leat is still visible throughout its length. The grid reference relates to the midpoint of the leat for indicative purposes.

Modern mill tail race. The Ordnance Survey 1:2500 First Edition mapping of 1867-8 depicts a water mill at this location, annotated as 'T. Mill'. A tail race runs fully 1.1km through Port e Chee meadow until it empties into the River Dhoo. The leat is still visible for most of its length, as an earthwork, cropmark, or open stream. The grid reference relates to the midpoint of the leat for indicative purposes.

The site of a post-medieval bridge.

The site of a post-medieval watermill.

The site of a post-medieval paper mill.

24 names listed. Second World War. The memorial was unveiled on 29 May 2012 by Captain Jack Ronan. Also present was His Excellency the Lieutenant Governor Adam Wood; Chairman of Port St Mary Commissioners, Bernadette McCabe; Director of Isle of Man Steam Packet Company, Kit Pemberton and four representatives from the French military who were closely involved in the operation to lift the anchor from the seabed at Dunkirk in 2010. The memorial was dedicated by the Rev. Andrew Brown, Archdeacon of the Isle of Man. It was sponsored by public subscription and lottery fund. The memorial was designed by the local War Memorial Committee with final design by Patrick Collett. The architect was MacOwen-Collett of Douglas, Isle of Man and the memorial was built by R.G.W. Builders of Lezayre, Isle of Man.

The site of a post-medieval fulling mill.

The site of a post-medieval house.

Not a hill in the geographic sense, no chance feature of the earth's creation. A constructed mound, built deliberately at the centre of the Island, at a site where Manannan's roads converge, where a keeill dedicated to St John stood before the Norse arrived, and where the midsummer gathering had taken place since before written record. The Norse established their thing-vollr at an already-sacred site. The Manx name Cronk-y-Keeillown preserves the pre-Norse chapel. The name Tynwald preserves the Norse assembly. The roads preserve Manannan. Three layers of meaning in one constructed mound.

It has been suggested in the past that the Tynwald Hill may have origins as a pre-Vikign place of assembly, possibly even a Bronze Age burial site, but this is speculative and no evidence has been discovered to date to support such a theory. The Bronze Age megalithic cist of King Orry's Grave is located less than 50 metres to the north.

Assembly place. Early written statutes record a parliamentary assembly, or 'thing' at "Killabane" in 1428. The actual site is believed to have been at SC 36158252, now the site of a quarry from which stone was extracted for the construction of the nearby St Luke's Church, which was consecrated in 1836. The site had until then appeared as a rocky eminence. A fair was held there until circa 1770 and 'seats' or tiers are said to have survived until at least the same time. The site was commemorated by an annual procession around it until about 1871, when it was described as 'levelled and enclosed in the adjoining field', though a fragment of the 'seats' was reportedly still to be seen in 1910. The circular stone enclosure to the south at SC 36178245 serves as a memorial to the assembly site, and is marked by a bronze plaque, set up by the Trustees of the Manx Museum in 1928 on the fifth centenary of the earliest recorded assembly here.

This the site of a new woollen mill complex which was built by the grandson of John Moore, grandson of the founder of the earlier Tynwald mill founded in 1846. Unlike the earlier mill the new mill was powered by electricity, not water. It continues to work today.