The Collaborative International Dictionary of English v.0.48:

Sable \Sa"ble\, v. t. [imp. & p. p. Sabled; p. pr. & vb. n.
   Sabling.]
   To render sable or dark; to drape darkly or in black.
   [1913 Webster]

         Sabled all in black the shady sky.       --G. Fletcher.
   [1913 Webster]