his officers and conveyed through a Spanish diplomatist to the enemy; possibly this was the cause of the Bulgar attack on the 17th, and Sarrail did not move until 7 September. He did, however, detain the three Bulgarian armies on the Salonika front, and Mackensen only had the help of the fourth, which had all along watched the Rumanian frontier. On 1 September his forces invaded the Dobrudja and seized Dobritch, Balchik, and Kavarna on the coast. On the 5th they captured Turtukai on the Danube with an infantry division and a hundred guns. Silistria farther down the river was thereupon evacuated, and on the 16th Mackensen stood on the line Rasova-Kobadinu-Tuzla, a dozen miles from the important railway running from Bukarest across the Tchernavoda bridge to Constanza; Tchernavoda was the only bridge across the Danube in the Balkans, and Constanza was Rumania's only Black Sea port. Here the stipulated Russian three divisions, composed partly of Serbs who had escaped into Rumania in 1915 and of Jugo-Slavs taken prisoners by the Russians from the Austrian forces, came to Rumania's assistance; and Mackensen was not only held, but driven back some fifteen miles. Falkenhayn, north of the Carpathians, disposed of greater strength, and during the latter half of September the Rumanians were steadily driven out of their conquests. A great feat of the Bavarian Alpine Corps was the capture on the 26th of the Roterturm Pass in the rear of the First Rumanian Army; elsewhere the retreat was carried out with skill, valour, and comparatively slight losses, and Falkenhayn found it no easy task to break the Carpathian barrier despite the advantages he possessed in every kind of equipment and in the experience of his men. But for the paralysis which overcame the Russian effort in the Carpathians he would have had the tables turned upon him, for no advance would have been possible against the Rumanian frontier had his flank been seriously threatened by the Russians from Jablonitza to the Borgo. Indeed, with a little more energy on the part of the Russian Government the Central Empires might have encountered in Transylvania a greater disaster than had yet befallen them. The Russian excuse was that their liabilities to Rumania involved an awkward extension of their front, yet it was Russia which had put most pressure on Rumania to intervene; and no account was taken of the huge extension of the Teutonic front achieved by that intervention, nor of the fate which Russia might have suffered if Falkenhayn and Mackensen had concentrated in the north the forces they led against Rumania. The relief which Russia secured thereby almost seems to support the sinister view of Stuermer's policy.