Thanks for all that Zandervix
There was one point that cleary goes against a plot point cleary outlined in Myth I
"TAIN
A device created by the Callieach. It appears as an ornate box, but when activated, it can sweep away those unlucky enough to be caught within its effect, and imprison them inside for all time."
"Murgen believes us to be trapped inside the Tain, a relic forged by the Smiths of Muirthemne during the Wind Age. Soon after its construction, the Tain was taken from Muirthemne by raiding barbarians from the south, and believed to be lost forever."
That fairly well defines the Tain as being a Dwarven Invention. Unless the Dwarves, unable to use the Tain or the Tain was destroyed, made a second one.
-zeph
