"Thanks to my nearness to the sea on the one side, and to the mountain region on the other, the period of the greatest heat passed away without my perceiving it; and I was much surprised at receiving a few days ago a letter from Bangkok which stated that it had been hotter weather there than had been known for more than thirty years. Many of the European residents had been ill; yet I do not think the climate of Bangkok more unhealthy than that of other towns of eastern Asia within the tropics. But no doubt the want of exercise, which is there almost impossible, induces illness in many cases. "A few days ago I made up my mind to penetrate into a grotto on Mount Sabab, half-way between Chantaboun and Kombau, so deep, I am told, that it extends to the top of the mountain. I set out, accompanied by Phrai and Niou, furnished with all that was necessary for our excursion. On reaching the grotto we lighted our torches, and, after scaling a number of blocks of granite, began our march. Thousands of bats, roused by the lights, commenced flying round and round us, flapping our faces with their wings, and extinguishing our torches every minute. Phrai walked first, trying the ground with a lance which he held; but we had scarcely proceeded a hundred paces when he threw himself back upon me with every mark of terror, crying out, 'A serpent! go back!' As he spoke I perceived an enormous boa about fifteen feet off, with erect head and open mouth, ready to dart upon him. My gun being loaded, one barrel with two bullets, the other with shot, I took aim and fired off both at once. We were immediately enveloped in a thick cloud of smoke, and could see nothing, but prudently beat an instant retreat. We waited anxiously for some time at the entrance of the grotto, prepared to do battle with our enemy should he present himself; but he did not appear. My guide now boldly lighted a torch, and, furnished with my gun reloaded and a long rope, went in again alone. We held one end of the rope, that at the least signal we might fly to his assistance. For some minutes, which appeared terribly long, our anxiety was extreme, but equally great was our relief and gratification when we saw him approach, drawing after him the rope, to which was attached an immense boa. The head of the reptile had been shattered by my fire, and his death had been instantaneous, but we sought to penetrate no farther into the grotto. [Illustration: SIAMESE ACTORS.]