Parallel - Eager Air

Shakespeare:

"It is a nipping and an eager air."
  Hamlet 1.4.2

Bacon: "Whereby the cold becometh more eager."
   Natural History

Comment: The O.E.D. cites the Hamlet line as the first recorded instance of "eager" applied to cold; and no further instance till 1854. But we see that Bacon used it in that sense too. He perhaps derived it from the French word "aigre", meaning eager or sharp.