  Hilbert's Theorem 90 is a classical result in the theory of cyclic
extensions. The quadratic case of Hilbert 90, however, generalizes in noncyclic
directions as well. Informed by a poem of Richard Wilbur, the article explores
several generalizations, discerning connections among multiplicative groups of
fields, values of binary quadratic forms, a bit of module theory over group
rings, and even Galois cohomology.
