3893m. East ridge of Aiguile Est de Trelatete gained via Petit Mt Blanc and the Rainetto Bivouac shelter. Fixed rope to descend to Glacier du Petit Mt Blanc, glacier ascent then steep snow (45 deg) to east summit. The ordinary route.
A Reilly, E Whymper with M Croz,M Payot and H Charlet 12/Jul/1864