Aaaand a little Goggling confirmed that Rudyard hisownself wrote a piece on Tubal Cain (and his brother Jubal). (Remember these names the next time you have twins. There was a Jabal, also, in case of triplets.)
Jubal and Tubal Cain
by Rudyard Kipling
Jubal sang of the Wrath of God And the curse of thistle and thorn
But Tubal got him a pointed rod, And scrabbled the earth for corn.
Old -- old as that early mould, Young as the sprouting grain
Yearly green is the strife between
Jubal and Tubal Cain!
Jubal sang of the new-found sea, And the love that its waves divide
But Tubal hollowed a fallen tree And passed to the further side.
Black -- black as the hurricane-wrack, Salt as the under-main
Bitter and cold is the hate they hold
Jubal and Tubal Cain!
Jubal sang of the golden years When wars and wounds shall cease
But Tubal fashioned the hand-flung spears And showed his neighbours peace.
New -- new as Nine-point-Two, Older than Lamech's slain
Roaring and loud is the feud avowed
Twix' Jubal and Tubal Cain!
Jubal sang of the cliffs that bar And the peaks that none may crown
But Tubal clambered by jut and scar And there he builded a town.
High -- high as the snowsheds lie, Low as the culverts drain
Wherever they be they can never agree
Jubal and Tubal Cain!