In one of Mr. Tarn's excursions into the country, he observed a sail in the offing, which he thought was a whale-boat; and
supposing it might be in distress, if not one of the Adelaide's, kindled a fire to attract attention. As the grass was very dry, it blazed furiously, and spread rapidly around, yet without exciting fear that it could do us any injury; but the next morning flames being observed on the crest of the hills, behind the valley in which our tent had been erected, a boat was sent to save it, and remove the instruments. Our men had just left the ship, when, fanned by a land breeze which rose with the sun, the flames flew on with rapidity, descended the valley, and before the boat reached the shore, had consumed every vestige of the tent, and several articles of minor consequence. The sextant and artificial horizon, lying on the ground, escaped destruction, and the dipping-needle had fortunately been taken on board. Before the fire burned itself out, the whole country for fifteen or twenty miles around was completely over-run, so that all hope of procuring guanacoes was destroyed. Previous to the fire, Mr. Tarn had shot one; but being young, the carcase only weighed one hundred pounds, and was scarcely worth the trouble of sending fifteen miles for; however, as an amusement to the people, I sent a party to bring it on board, and it proved sufficient to furnish the ship's company with a fresh meal.
We had seen several herds within four miles of the ship before the conflagration; but the country was so very level and open, that these shy animals were always warned of the approach of our people by their vigilant scouts. So watchful and attentive is the look-out at his post, that he never drops his head even to feed, and it is only with the greatest cunning and care a man can get near the herd. The best way is, to lie concealed near the water holes, and await their coming to drink. A small stream of fresh water trickled over the beach into the bay, fringed by a patch of grass which the fire had spared, at which having once observed a guanaco drinking, we set a watch; but whether the animals were aware of it or not, none came until the morning we sailed, when a small herd walked down to the place quite unconcernedly, having no doubt first ascertained that there was no danger.
The little vessel Mr. Tarn saw was an American sealer, which anchored in the bay next morning.
Besides the guanacoes, and fox, above-mentioned, we saw no quadrupeds, although two or three sorts of cavia and the puma are common in this neighbourhood. Of birds, nothing interesting was seen, except a plover (Totanus fuscus?), oyster-catcher (Hæmatopus niger, rostro rubro, pedibus albis), and one of the night bitterns, very much resembling the young of the European bird;[[115]] but these three species had previously been found at Port Famine. Several lizards were taken, and preserved.
This extremely sterile and barren country is very unfavourable for animals of any kind. The soil is like that already described about Port Desire. The rock is of the same character as at Port St. Elena and Port Desire: red porphyritic claystone.[[116]]
On the 23d of March, a week having passed since we came to Port Desire, my anxiety for the Adelaide's safety was much increased; especially as both wind and weather had been favourable for her approach to this rendezvous. I therefore despatched Lieut. Wickham overland to Port Desire to order the Beagle to join us, and proceed with us to the other points of rendezvous, Port San Julian and Cape Fairweather. Lieut. Wickham reached Port Desire after a fatiguing walk, and early next morning the Beagle was beating into Sea Bear Bay against a very strong wind which increased, and detained us. I seized this opportunity of completing our consort's provisions to five months. Captain Fitz Roy informed me that he had taken advantage of his stay at Port Desire, to ascend the inlet to the head. It extended for thirty miles, and the water was salt to its very extremity; but, from the height of the old banks on each side, it appeared likely that at times there may be considerable freshes. At the head of the river he lighted a fire,
which spread, and soon joined that which Mr. Tarn had made. Their union probably burned many square leagues of country.
On the 27th, we were still detained by a southerly gale. Captain Fitz Roy accompanied me in search of Indian graves, which are described to be on the summits of the hills. We found the remains of two, one of which had been recently disturbed, but the other had been opened a considerable time.