The Russian army of the Caucasus reckoned, in 1843, about eighty thousand men, exclusive of thirty-five thousand who had little to do with the war, but were more especially employed in watching the extensive line of Turkish and Persian frontier, and in endeavouring to exclude contraband goods and Asiatic epidemics. But the severe fighting that occurred in 1842 and 1843, showed the necessity of an increase of force. Subsequent events have not admitted of a reduction in the Caucasian establishment; and we are probably very near the mark, in estimating the troops occupying the various forts and camps on the Black Sea, and the lines of the rivers, (Terek, Kuban, Koisu, &c.,) at about one hundred thousand men--not at all too many to guard so extensive a line, against so active and enterprising a foe. The Russian ranks are constantly thinned by destructive fevers, which, in bad years, have been known to carry off as much as a sixth of the Caucasian army. At a review at Vladikawkas, Dr Wagner was struck by the powerful build of the Russian foot-soldiers--broad-shouldered, broad-faced Slavonians, with enormous mustaches, drilled to automatical perfection. In point of bone and limb, every man of them was a grenadier. In a bayonet charge, such infantry are formidable opponents. Ségur mentions that, on the battle-field of Borodino, the nation of the stripped bodies was easily known--the muscle and size of the Russians contrasting with the slighter frames of French and Germans. "You may kill the Russians, but you will hardly make them run," was a saying of Frederick the Great; and certainly Seidlitz, who scattered the French so briskly at Rossbach, had to sweat blood before he overcame the Russians at Zorndorf. Those survivors of Napoleon's famous Guard who fought in the drawn battle of Eylau, will bear witness to the stubborn resistance and bull-dog qualities of the Muscovite. But the grenadier stature, and the immobility under fire--admirable qualities on a plain, and against regular troops--avail little in the Caucasus. The burly Russian pants and perspires up the hills, which the light-footed chamois-like Circassians and Tshetshens ascend at a run. The mountaineers understand their advantages, and decline standing still in the plain to be charged by a line of bayonets. They dance round the heavy Russian, who, with his well-stuffed knapsack and long greatcoat, can barely turn on his heel fast enough to face them. They catch him out skirmishing, and slaughter him in detail. "One might suppose," said a foreigner in the Russian service to Dr Wagner, "that the musket and bayonet of the Russian soldier would be too much, in single combat, for the sabre and dagger of the Tshetshen. The contrary is the case. Amongst the dead, slain in hand-to-hand encounter, there are usually a third more Russians than Caucasians. Strange to say, too, the Russian soldier, who in the serried ranks of his battalion meets death with