Sentence:  This bauble, said he, shewing me an elegant sprig of diamonds, is an <WSD>aigret</WSD>, sent in last week by a lady of quality, who has ever since kept home with her head muffled up in a double clout for a pretended fit of the tooth-ache. 
Meaning of the word marked with <WSD> tags:  A plume or tuft for the head composed of feathers and/or gems, etc.