But infinitely more important in its bearing upon his future work than all the tangible yield of this fruitful journey, was the retention by Delacroix's memory of the brilliant colour visions which had met his delighted eyes in the dazzling light of the East. The result was an entirely new conception of chromatic effects and an infinitely more sensuous use of his pigments than is to be found in any of his earlier works. Before his journey to Morocco, Delacroix, though already essentially a colourist in his method if compared with the draughtsmen of the David-Ingres School, paid but little attention to the quality of paint _per se_. Colour served him to enhance the dramatic effectiveness of his compositions, and pigment had assumed a vital function in the building up of forms; but he was still addicted to an excessive use of bituminous browns and warm glazes and paid little or no attention to what the modern studio jargon terms the "preciousness of paint." With the "Algerian Women in their Apartment," which he sent to the Salon of 1834, he entered upon an entirely new phase. It is painted in a rich impasto of luminous colours which sparkle in unbroken strength through an ambient of soft silvery grey atmosphere. The very choice of subject indicates a significant change. In the place of dramatic climax or tempestuous movement and passion and violent emotion, we find here complete repose and the indolent lassitude engendered by the luxurious comfort and by the strong scent of burning spices in the Eastern harem. In a subject of this kind the artist could allow himself to yield completely to the sensuous enjoyment of the rare and at the time entirely novel harmonies of pure, beautiful colour evolved by his brush. The superbly painted negress on the right of the composition undoubtedly owes much to the Spanish masters whom Delacroix must have studied during his brief visit to the Peninsula; and there is as little doubt that she in turn became the progenitor of the wonderful negress in Manet's "Olympia." Indeed, Delacroix at this stage must be considered Manet's precursor and source of inspiration.