The Collaborative International Dictionary of English v.0.48:

Mantle \Man"tle\, v. t. [imp. & p. p. Mantled; p. pr. & vb. n.
   Mantling.]
   To cover or envelop, as with a mantle; to cloak; to hide; to
   disguise. --Shak.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mantling \Man"tling\, n. (Her.)
   The representation of a mantle, or the drapery behind and
   around a coat of arms: -- called also lambrequin.
   [1913 Webster]