in Thoreau’s Journal:  

…every twig and trunk and blade of withered sedge is thus covered or cased with ice, and accordingly…when you go facing the sun, the hollows look like a glittering shield set round with brilliants…

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The snow which 3 quarters conceals the cassandra—in these ponds—& every twig & trunk & blade of withered sedge is thus covered or cased with ice— and accordingly, as I have said, when you go facing the sun, the hollows look like a glittering shield set round with brilliants. That bent sedge in the midst of the shield—each particular blade of it being married to an icy wire 20 times its size at least shines like polished silver rings or semicircles— It must have been far more splendid here yesterday before any of the ice fell off—