154 Sept. 2-3 A. F. Mummery Z’Mutt side Mr. Mummery was the first to ascend the Matterhorn from the side of the Z’Mutt Glacier. No details have been received. 155 Sept. 2-3 W. Penhall Z’Mutt side Guides—Ferdinand Imseng and Louis Sorbrichen. Mr. Penhall also made his ascent upon the Z’Mutt side, but took a route more to the south than that followed by Mr. Mummery. 156 Sept. 4-5 B. Wainewright Zermatt to Breil Guides—Jos. Imboden and Peter Sarbach. 157 Sept. 4-5 H. Hoare Zermatt Guide—J. Anderegg and (porter) Jos. Chanton. 158 Sept. 5-6 J. Baumann Z’Mutt side Guides—Petrus (Stalden) and Emile Rey. Mr. Mummery’s route was followed. 159 ? J. Maurer Breil to Zermatt Guides—? No information. The above table is known to be imperfect, and the Author will be obliged if correspondents will enable him to correct and extend it. Communications should be addressed to him _Care of the Publisher_. *G.* COURTE NOTE SUR LA GÉOLOGIE DU MATTERHORN. PAR SIGNOR F. GIORDANO, Ingénieur en Chef des Mines d’Italie, etc. etc.