Mr. Mackenzie estimates the losses of the Turks up to June 30 at not less than 70,000. Prime Minister Asquith in the House of Commons, on July 1, announced that the British naval and military losses up to May 31 aggregated 38,635 officers and men. Yet the great fortress of Achi Baba, by that time one of the most powerful in the world, was untaken up to July 20, and the French and British Allies held but a small corner of the area to be conquered. [Footnote 4: His first report, covering the actions from March 13, when he left London, to May 20, is here omitted because other official reports covering the same period were printed in the June and July numbers of CURRENT HISTORY.] BATTLE OF THE LONGEST DAY By Compton Mackenzie Authorized Press Representative at the Dardanelles. Dardanelles, via Alexandria, June 30, 1915. The battle of the Fourth of June ended with substantial progress on our centre, although on our left and on our right, notwithstanding the most violent charges and counter-charges, we were unable to consolidate some of our initial gains. The reason of this may be found in the natural strongholds of the Turkish flanks, natural strongholds that are helped by the most elaborate fortifications. The British and French line from the Aegean to the Dardanelles is confronted by rising ground that culminates in the centre with the flat summit of Achi Baba, 800 ft. high. On either side the ground falls away to the sea in ravines and dry watercourses (_deres_), which the Turks have had time to make impregnable to any except those superb troops that are now fighting to pass over them. There is no room upon the Gallipoli Peninsula to find weak points, and we are now in the position of having to storm an immensely strong fortress, the advanced works of which, by an amazing feat of arms, we already hold, and the glacis of which has to be crossed before we move forward to the assault upon the bastion of Achi Baba and beyond to the final assault upon the very walls of that fortress, the Kilid Bahr Plateau.