In message <[log in to unmask]>, HISTARCH
automatic digest system <[log in to unmask]> writes
>INSCRIBED SLEEVE LINK INSETS
>
>During excavations at the Old Barracks in Trenton, we recovered a probable
>sleeve-link/sleeve-button inset of creamish-white opaque paste.  This
>example has the slogan "Wilkes and Liberty No 45" lightly incised on its
>surface and infilled with a purple-red color.

Are these what in British English are "cuff-links" - i.e. metal (and
sometimes other materials) devices for fastening sleeve cuffs - which,
rather than button and button-hole, they have a pair of holes?  If so,
that might expand your googling.

I curated an exhibition on Wilkes at Buckinghamshire County Museum ten
years ago, and am afraid I cannot remember whether cuff-links were among
the objects displayed - the only thing that I remember is a bust of
Wilkes which we borrowed from MP Tony Banks - Tony described me as 'the
only woman who is as busy as I am' - a situation which isn't ideal when
organizing and exhibition.  I don't think there was anything as
permanent as a catalogue for the exhibition, but Buckinghamshire County
Museum may be able to trace parallels in its collections - as indeed may
the Museum of London.  I am afraid I don't know what has become of the
(late) Tony Banks' collection.

Best wishes,

Pat

Pat Reynolds
Surrey Heritage Manager, etc.

-- 
Pat Reynolds
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   "It might look a bit messy now, 
                    but just you come back in 500 years time" 
   (T. Pratchett)