Rubers Law (or locally probably more often Ruberslaw) is a prominent, conical hill in the Scottish Borders area of south-east Scotland.

The summit rocks represent the remains of a volcano, formed by a volcanic eruption during the Carboniferous Period, roughly 330 million years ago.

The poet Dr John Leyden, who was born in Denholm, climbed the hill in his youth, and described it in a poem of 1803.

While it stands in relative isolation, it is linked to Peel Fell by a ridge of high ground, and so forms a northern projection of the Cheviot Hills which straddle the Anglo-Scottish border.

[5] Most of Rubers Law is agricultural land, divided into a patchwork of fields by dry stone walls and fences, along with strips and patches of coniferous woods.

[11] These rocks, now assigned to the Stratheden or Inverclyde groups (undifferentiated), were formed during the late Devonian or early Carboniferous Periods from the sand and gravel deposits of ancient river systems.

[12] This sedimentary deposition was followed by a period of volcanic eruptions which produced a series of basaltic lavas, some of which are now found near Kelso.

The rest of the summit rocks are microgabbro (previously known as dolerite), the remains of a volcanic plug formed from magma which solidified within the vent.

The earliest may have been an Early Iron Age hill fort or oppidum, represented by the remains of an outer wall, running at the same level around the hilltop, enclosing an area of 7 acres (2.8 ha) with a well-marked entrance to the south.

A workman digging field drains on the south-east side of the hill in 1863, 400 feet (120 m) below the summit, discovered a hoard of bronze vessels of Roman age.

[5][6] A post-Roman fort, consisting of an inner enclosure or citadel on the summit of the hill, and an annex to the south including the southern rock ridge and the plateau, was built of loose boulders but also incorporated masonry from the earlier Roman building.

A hut circle within the citadel was excavated in 1907 but no remains were found apart from small quantities of charcoal and burnt bones.

People from Bedrule, Denholm and Minto churches met there to commemorate both the two thousandth anniversary of the birth of Jesus Christ, and earlier Christians who had worshipped in that place.

[15] The Scottish romantic poet Dr John Leyden (1775-1811), who was born in Denholm, described going up Rubers Law in his poem Scenes of Infancy (1803).