Complex sentence: Within a year of returning to Paris in 1803, Melling published a prospectus for the Voyage pittoresque de Constantinople et des Rives du Bosphor, the first thirteen livraisons in 1809, and set up an engraving studio for the purpose of reproducing completed images of his drawings.
Split into simpler sentences: Within a year of returning to Paris in 1803, Melling published a prospectus for the "Voyage pittoresque de Constantinople et des Rives du Bosphor". By 1809 he had set up an engraving studio for the purpose of reproducing completed images of his drawings.