ARLAUD, GEORGES-LOUIS (1869-1944 )Vingt études de nu en plein air. Horos Éditions, Paris, [ 1921]. Grand In-folio (42 x 27 cm). Original edition. Portfolio containing 25 plates including 5 title and text plates and 20 photographic plates reproduced in heliogravure under serpents, text by Saint Pol Roux. Flexible folder with flaps with title printed on the cover. (One centimeter tear at the top corner of the portfolio, copy in good condition). Ref. Bertolotti, pp. 40-41.