From a military point of view the reconnaissance of this route was of the greatest importance, since, should it be found practicable to infantry, it would be possible to make use of it, when the time served, as the means of advance for a column destined to attack the enemy's positions on the right flank. In Thaï-Nguyen there was a garrison consisting of two companies of the Foreign Legion, one of native infantry, a section of mountain artillery, and a detachment of militia. My squad formed part of the small column which left Nha-Nam on the 4th September, at five in the morning, to explore this road. Though it had been supposed that the distance to be covered would not exceed 25 miles, we actually marched close upon 35 before reaching our destination. At intervals we were obliged to cut our way through the vegetation which had invaded the track, and it was only by using the utmost care that our little party succeeded in keeping in the right direction. On several occasions we disturbed big herds of deer, which scampered away on our approaching them; the tracks of tigers were frequently visible, and once the advance guard, consisting of half a dozen _tirailleurs_, were considerably startled by the presence of a fine python which lay basking in the sun, close by the track. It was only after several stones had been thrown at it that the big snake decided on withdrawing into the long grass. Owing to the advisability of concealing our movements from the enemy, it was deemed necessary not to make use of firearms on this occasion. The men suffered much owing to the extreme heat; the path was in the worst of conditions, and we were obliged to twice ford a river, which, though not very deep, was exceedingly rapid, so that our expedition proved to be a very arduous one to all who took part in it. It was nearly 8 P.M., and quite dark, when we reached our destination, and several of the men fell exhausted whilst waiting in the ranks for a hut to be prepared for us to pass the night in. Thaï-Nguyen possessed a fine citadel, of the Vauban style, which was built in 1798, and it was in this that the garrison dwelt. The town and its neighbourhood was at this time infested by tigers, which prowled about the streets after dark, so that it was imprudent for the inhabitants to go out without a torch or a light of some kind. So great was the voracity and daring of these animals that on several occasions they had penetrated into the citadel and carried off dogs and goats belonging to the garrison. Indeed, the doctor, by an extraordinary stroke of good luck, killed one with a revolver shot as it was groping under his bed in search of a favourite pointer which had taken refuge there. Report had it that the lucky slayer of this greedy feline was so excited by his good fortune that he was found more dead than alive by the guard who ran to the hut on hearing the report of his weapon.