Portrait of William Inigo Jones - John Hoppner
Portrait of a bearded nobleman, in a pink slashed doublet with a white ruff and a black jacket, wearing a medallion - Francois Clouet
Portrait of Colonel Cyrus Trapaud - Sir Joshua Reynolds
Portrait of a gentleman - (after) Sir Francis Grant
Portrait of Mrs. M. W. Ridley - Matthew White Ridley
Portrait of a gentleman, small bust-length, in a black jacket and cravat - (circle of) Chinnery, George (1774-1852)
Portrait of George Arnold Esq of Ashby Lodge - William Hogarth
Portrait Of A Lady, Half Length, Wearing A Blue Dress With Red Flowers, Beside A Table With A Vase Of Roses - Portugese School
Portrait of a gentleman, bust-length, in a brown coat and yellow waistcoat - (after) Sir Henry Raeburn
Portrait Study Of A Gentleman - Sir Edwin Henry Landseer
Note that a few countries have copyright terms longer than 70 years: Mexico has 100 years, Colombia has 80 years, and Guatemala and Samoa have 75 years. This image may not be in the public domain in these countries, which moreover do not implement the 
