After rain delays from 2 August, II Corps attacked again on 10 August, to capture the rest of the black line (second objective) on the Gheluvelt plateau. The infantry advance succeeded but German artillery-fire and infantry counter-attacks isolated the infantry of the 18th (Eastern) Division in Glencorse Wood. At about German infantry attacked behind a smokescreen and recaptured all but the north-west corner of the wood; only the 25th Division gains on Westhoek Ridge to the north were held. Lieutenant-Colonel Albrecht von Thaer, Chief of Staff of (Group Wytschaete, the headquarters of the IX Reserve Corps), noted that casualties after in the line averaged compared to on the Somme in 1916 and that German troop morale was higher than the year before.