Robert Koehler

Head of an Old Woman, 1881 Robert Koehler

Rainy Evening on Hennepin Avenue, c.1902 Robert Koehler

Portrait of Robert Koehler, 1910 Philip Little

Illustration of Scientist Robert Koch Working in Laboratory Anonymous

Robert Harley, 1st Earl of Oxford, 1714 Godfrey Kneller

Robert Koch Anonymous

Engraving of Robert Koch in his Laboratory Anonymous

Robert Koch (1843-1910). Engraving. Colored. Anonymous

Papa Cobden taking Master Robert a free trade walk, 1845 Richard Doyle

Letter from Caleb Cheeshahteaumauk to Robert Boyle Caleb Cheeshahteaumauk

Robert Koch Anonymous

Robert Hamerling August Prinzhofer

Colwich - Tomb of Robert Wolseley: pen and ink drawing, 1837 Thomas Peploe Wood

Memoirs of George III, by Robert Huish Eldridge

Portrait of Robert Boyle Anonymous

Robert E. Lee Smiling Anonymous

Robert Harley, 1st Earl of Oxford and Mortimer English School

Robert Montgomery (1904-1981), American actor and director Anonymous

Robert Montgomery (1904-1981), American actor and director Anonymous

Robert Montgomery (1904-1981), American actor and director Anonymous

Robert Taylor (1911-1969), American actor Anonymous

Robert Dingley, 1762 William of Bath (after) Hoare

Robert Peel (1788-1850) Anonymous

Portrait of Robert Junius Arnoldus Montanus

German Composer Robert Schumann Anonymous

Robert Young, American actor Anonymous

Portrait Engraving of Robert Mills Anonymous

German Composer Robert Franz Anonymous

Maj. Gen. Robert E. Lee Engraving Anonymous

General Robert E. Lee Engraving O'Neill

Robert Montgomery (1904-1981), American actor and director Anonymous

Robert Colquhoun, 1914 - 1962. Artist (Self-portrait) Robert Colquhoun

Lithograph of Robert Schumann Posing with His Wife Hofelich

Portrait of Colonel Robert Gould Shaw Anonymous

Portrait of Robert Rogers Anonymous

Robert Browning W H Grove