What is "spryest"

Spry \Spry\ (spr[imac]), a. [Compar. Sprier or Spryer (-[~e]r); superl. Spriest or Spryest.] [Cf. dial. Sw. sprygg lively, skittish, and E. sprag.] Having great power of leaping or running; nimble; active.

She is as spry as a cricket.
--S. Judd (Margaret).

If I'm not so large as you, You are not so small as I, And not half so spry.
--Emerson.

a. (en-superlative of: spry)