Pair of painted silhouettes in brass frames 1820

This beautiful pair of watercolour silhouettes is of unknown sitters, but there is a difficult to read name au verso probably” White”. They are highlighted with what appears to be Antwerp blue. The gentleman’s hair is waved, highest over the forehead, with long whiskers and a cravat (mail coach scarf). His tail coat has a gathered sleeve with open M notch. This places the sitting to be 1810-20. (see McKechnie page 109, illustration 133).The lady has a hair knot away from the nape of the neck in the middle of the head.  The puffing of the shoulder sleeves place the date at about 1820 (see McKechnie page 149, illustration 205). The ruff fill ins or part of the dress and the high neck (P 137) add to the dating criteria.The original frames are brass faced with brushed finish, and a delightful rope decorated edge. The shaped wooden core has a padded leather backing held in place by 4 screws. The wood (!) spacers have been replaced by neutral pH card. The distinctive features above should enable identification of the silhouettist, and research continues. They are exceptionally executed and would be a fine addition to a collection demonstrating, unusual technique and framing.