No. 2.
ENIGMA.
My first is in mist, but not in fog.
My second is in cat, but not in dog.
My third is in cart, but not in wagon.
My fourth is in beast, but not in dragon.
My fifth is in wheat, but not in corn.
My sixth is in birth, but not in born.
My seventh is in hurt, but not in sting.
My whole was an ancient Scottish king.
K. K.