Sir William John Newton (1785-1869) A portrait miniature on ivory, signed W.I.N and dated 1817 The oval portrait reputedly depicting Joseph Silver, the subject with fair hair, dressed in a navy frock coat and jabot, housed within a brass frame inscribed verso 'Asprey. 166 Bond St. & 22. Albermarle St.,' signed lower right, 7.6 cm high