▁past ▁the ▁cre vas se ▁that ▁st ym ied ▁the ▁ 1 9 5 1 ▁expedition ▁by ▁first ▁desc ending ▁ 6 0   ft ▁into ▁it ▁to ▁a ▁snow ▁bridge ▁and ▁then ▁used ▁a ▁prec ari ous ▁ro pe ▁bridge ▁to ▁reach ▁the ▁other ▁side . ▁They ▁were ▁the ▁first ▁people ▁to ▁stand ▁in ▁the ▁Western ▁C w m . ▁On ▁May ▁ 2 7 , ▁four ▁clim bers ▁( R ay mond ▁Lam bert , ▁T enz ing ▁N org ay , ▁R ene ▁A ub ert , ▁and ▁Leon ▁Fl ory ) ▁started ▁from ▁their ▁t ents ▁on ▁the ▁South ▁Col , ▁two ▁teams ▁of ▁Lam bert / T enz ing ▁and ▁A ub ert / Fl ory . ▁Lam bert / T enz ing ▁reached ▁Camp ▁VII ▁first ▁at ▁ ▁followed ▁by ▁A ub ert / Fl ory . ▁The ▁tent ▁was ▁too ▁small ▁for ▁both ▁teams ▁and ▁A ub ert / Fl ory ▁decided ▁to ▁return ▁to ▁the ▁South ▁Col . ▁The ▁team ▁had ▁only ▁under g one ▁the ▁as cent ▁for ▁reconna issance ▁and ▁so ▁only ▁one ▁tent ▁and ▁a ▁bit ▁of ▁food ▁had ▁been ▁taken . ▁On ▁May ▁ 2 8 ▁in ▁un sett led ▁weather , ▁the ▁final ▁assault ▁team ▁of ▁Lam bert ▁and ▁T enz ing ▁turned ▁back ▁ 1 5 0 ▁metres ▁short ▁of ▁the ▁south ▁sum mit . ▁▁▁▁ ▁The ▁Swiss ▁attempted ▁another ▁expedition ▁in ▁the ▁aut umn ▁of ▁ 1 9 5 2 ▁under ▁the ▁lead ▁of ▁Gabriel ▁Che val ley