R, ruis, the dwarf elder in Ogham. The rochat, or ... - Rodney Mackay

The warrior Cas Corach played music to enchant them and
convinced them that they should assume human form to have
a better grasp of the melodies. When they shape-changed,
the hero threw his spear at them, impaled all three at once,
and beheaded them. With this reputation it is not surprising
that men had to be bribed to enter the Hill of Cruach. Ailill
of Connaught regularly offered a prize of a gold-hilted
sword to any man who would go to the gallows just outside
the rath and encircle the foot of a dead captive on the
gallows with a withe or band of willow twigs.
This device then became as effective as a silver
bough in gaining admission to the Otherworld. Several
warriors went out on the Samhain to try this stunt but none
but Nera followed through to the end of the adventure. As
Nera was placing the withe, the corpse spoke asking that he
be taken down and given a drink. Nera obeyed carrying the
dead man half slung over a shoulder. The pair found the
first house they approached surrounded by flames, and a
second encircled by a broad moat filled with water, so they
moved on. At a third house the dead man was offered three
cups of water. The dead man spat out the third cup at the
people who had offered him hospitality and its poison killed
them on the spot. Nera then carried the corpse back to the
gallows as instructed.
Returning to Ráth Cruachan, this gillie saw Mebd’s
palace aflame and saw beheaded corpses scattered on the
ground. It appeared that Fomorian invaders had used the
opening of the “eye” that was the Cave of Cruachan to do
what damage they could in the world of men. Nera followed
this crew through the veil before it closed at dawn and on
the other side became the “guest” in a sidh of the
Otherworld. Here he was ordered to carry firewood and
lodged with a female of the species. They became lovers
and the sigh-woman informed him that what he had seen of
the destruction of the rath was a possible future rather
than an event, and that it could be forestalled by escaping
to the east and destroying the entrance. Nera therefore took
his wife and child back through Cruachan and told king Ailill