Victorian Explorer Photograph

Antique sepia-toned photograph circa 1890, a European explorer in a linen pith helmet standing at the edge of the Nile, a coal-powered steam riverboat behind him, formal composed portrait, aged paper texture with brown and cream tones, vignette darkening the edges, no digital artifacts Insert discreet watermark in the lower right corner of the image, vertical text (rotated 90°), written "aipromptlabs.online", Calibri Light font, white color with low opacity (semi-transparent), medium size. Extreme sharpness on the face, fabric texture and typography of the letters. Shot on Canon EOS R5, 50mm f/2.8, studio light.