ART:  Thomas Gainsborough - "The Blue Boy" - Huntington Library:  The Blue Boy (c. 1770) is a full-length portrait in oil by Thomas Gainsborough, owned by The Huntington in San Marino, California, and now on display at The National Gallery, in London.  One of Gainsborough's best known works, The Blue Boy was long thought to be a portrait of Jonathan Buttall (1752–1805), the son of a wealthy hardware merchant, because of his early ownership of the painting. This identification has never been proven and as Susan Sloman argued in 2013, the likely sitter is Gainsborough's nephew, Gainsborough Dupont (1754–1797).  It is a historical costume study as well as a portrait; the youth appears in clothing from the 17th century as the artist's homage to Anthony van Dyck and is very similar to Van Dyck's portraits of young boys, especially his double portrait of brothers George Villiers, 2nd Duke of Buckingham and Lord Francis Villiers.  This Photochromatic postcard is in good condition.  Arthur Jaffe Heliochrome Co.  New York.