Cockshut light

from The Collaborative International Dictionary of English v.0.48

Cockshut \Cock"shut`\, n.
   A kind of net to catch woodcock. [Obs.] --Nares.
   [1913 Webster]

   {Cockshut time} or {Cockshut light}, evening twilight;
      nightfall; -- so called in allusion to the tome at which
      the cockshut used to be spread. [Obs.] --Shak. B. Jonson.
      [1913 Webster]