Gaucho cavalrymen (c.1818), perhaps from Sao Paulo and serving with the Portuguese forces occupying Montevideo, Uruguay, perhaps in the forces of Gervasio Artigas.  By E.E. Vidal (1791-1861).
<bdi><a href="https://en.wikipedia.org/wiki/en:Emeric_Essex_Vidal" class="extiw" title="w:en:Emeric Essex Vidal"><span title="British painter (1791-1861)">Emeric Essex Vidal</span></a>
</bdi>
1818<div style="display: none;">date QS:P571,+1818-00-00T00:00:00Z/9</div>
Picturesque Illustrations of Buenos Ayres and Monte Video (1820)