e ▁Her bin , ▁Marie ▁Laur enc in , ▁Fern and ▁Lé ger , ▁Jean ▁Met z inger , ▁Pablo ▁Pic asso , ▁Jean ▁P uy ▁and ▁Henri ▁R ous seau ) ▁were ▁sold ▁by ▁the ▁government ▁in ▁a ▁series ▁of ▁au ctions ▁at ▁the ▁H ôtel ▁Dr ou ot ▁in ▁ 1 9 2 1 . ▁Ros enberg ▁had ▁himself ▁appointed ▁as ▁' ex pert ' ▁for ▁the ▁sales . ▁ ▁From ▁ 1 9 2 4 ▁to ▁ 1 9 2 7 , ▁Ros enberg ▁made ▁his ▁activities ▁known ▁through ▁his ▁Bul letin ▁de ▁l ' E ff ort ▁moderne ▁( É d itions ▁de ▁l ' eff ort ▁moderne ), ▁a ▁publication ▁featuring ▁writ ings ▁and ▁illustr ations ▁by ▁contrib utors ▁such ▁as ▁Lé once ▁Ros enberg , ▁Albert ▁G le izes , ▁Piet ▁Mond rian , ▁G ino ▁Sever ini .< ref >[ https :// books . google . com / books / about / B ul letin _ de _ L _ eff ort _ Mod erne . html ? id = y T t DP g A AC AA J & red ir _ esc = y ▁Bul letin ▁de ▁l ' E ff ort ▁moderne ', ▁Lé once ▁Ros enberg , ▁Albert ▁G le izes , ▁Piet ▁Mond rian , ▁G ino ▁Sever ini ] </ ref > ▁ ▁In ▁ 1 9 2 8 ▁Ros enberg ▁moved ▁his ▁personal ▁collection ▁to ▁his ▁a partment ▁rue ▁de ▁Long ch amp , ▁Paris , ▁and ▁commission ed