Portrait of man in the center of the image, sitting in a chair with legs in X. Long face, dark hair partly gray, straight, parted on the side. Brown eyes, dark eyebrows and whiskers. Black uniform with central buttoning, golden buttons. On the left chest plaque of the Order of Christ. Right arm resting on a rectangular work table. Left arm close to the body, hand on the thigh. At the bottom: floor, vegetation and piece of wood. In the background on the left are soldiers and several white tents, one of which has the imperial flag on top. Signature in the lower left corner: J. Courtoiz. The portrayed is Manuel Luís Osório (Conceição do Arroio/RS, May 10, 1808 – Rio de Janeiro/RJ, October 4, 1879), the Marquis of Herval, patron of the Cavalry of the Brazilian Army.