"I bought for twenty-five ticals a small boat to enable me to visit the isles of the gulf. The first I landed at was named Konam-sao; it is in the form of a cone, and nearly two hundred and fifty metres[7] in height, but only two miles in circumference. Like all the other islands in this part of the gulf, it is of volcanic origin. The rocks which surround it make the access difficult; but the effect produced by the richness and bright green of the vegetation is charming. The dry season, so agreeable for European travelling, from the freshness of the nights and mornings, is in Siam a time of stagnation and death for all nature; the birds fly to the neighborhood of houses, or to the banks of the rivers, which furnish them with nourishment; rarely does their song come to enchant the listener; and the fishing-eagle alone utters his hoarse and piercing cry every time the wind changes. Ants swarm everywhere, and appear to be, with the mosquitoes and crickets, the only insects that have escaped destruction. "Nowhere did I find in these islands the slightest trace of path or stream; and it was extremely difficult to advance at all through the masses of wild vines and interwoven branches. I was forced to make my way, hatchet in hand, and returned at night exhausted with the heat and fatigue. "The greater portion of the rocks in the elevated parts of these islands is elementary and preserves traces of their ancient deposit beneath the waters. They have, however, undergone considerable volcanic changes, and contain a number of veins and irregular deposits of the class known as contact deposits, that are formed near the junction of stratified rocks with intruded igneous masses. "On the 26th we set sail for the first of the Ko-Man Islands, for there are three, situated close together, bearing this name. The largest is only twelve miles from the coast. Some fishing-eagles, a few black doves, and a kind of white pigeon were the only winged creatures I saw. Iguanas are numerous, and when in the evening they come out of their retreats, they make such a noise in walking heavily over the dead leaves and branches that one might suppose it caused by animals of a much larger size. "Toward evening, the tide having fallen, I allowed my boat to ground on the mud, which I had remarked during the day to be like a peat-bog impregnated with volcanic matter; and during the whole night so strong a sulphurous odor escaped from it that I imagined myself to be over a submarine volcano. "On the 28th we passed on to the second island, which is higher and more picturesque than the other. The rocks which surround it give it a magnificent effect, especially in a bright sunlight, when the tide is low. The isles of the Patates owe their name to the numerous wild tubers found there.