Nov. 24th.—Left about 11 for Thuma-thaya: we first descended the Dissoo ravine, then up a very steep hill, the top of which was cultivated, then descended and crossed another stream, the remainder of our march consisting almost entirely of an uninterrupted steep ascent: during our progress we gained partial views of the Plains and the Naga Hills, but on crossing a high ridge on which I observed Betula Populus? Rhododendrum arboreum, the view to the East and West was very fine. That to the W. embracing the greater part of the plains about Suddiya and the Abor Hills, stretching along to S.W. the more distant Naga Hills. The Lohit could be traced for an immense way, the Dihong, Dibong, Digaroo, Dihing were all partially visible. To the N.E. Thegri-thaya was finely seen, then some rugged peaks among which Laim-planj was conspicuous. It embraced the course of the Lohit, at least its right bank, ridge surmounting ridge: the loftier ones tipped with snow; and lastly it was closed by a huge wall, all covered with snow, especially its peaks, stretching away to the N. From this we descended to Yen, where, as usual, I took up my quarters in a granary. During the latter portion of the journey, I gathered a Passiflora? Lobelia two species, a Scitaminea, Spiræa, and a curious aromatic plant, pedunculis bracteæ adnatis, bracteis, coloratis, petal videis.
Codonopsis, etc. Dicksonia, stipitibus atris 3 canaliculatis, frondibus amplis, 10 pedalibus; in fine fructification; this is the same with the Manmoo plant. I observed likewise an arborescent Sambucus, a Bonnaya, a huge Begonia: Coix was seen cultivated.
Nov. 25th.—Spent the day in botanising. Gathered Adamia, some fine ferns, a bamboo, spiculis dense congestis, bracteis scariosis interspersis, and Schizosfachyum, Nees ab E. etc.
Another and much finer species of the Fumariaceous genus, I found on Laim-planj, Deutzia, a rare Quercus, a fine species of Antonia, (Br.) in fruit, a Bartramia, Trematodon, Neckera, etc., noticed a fruit something similar to that of Combretum, allis 2 maximis, 2 minimis: cotyledonibus hæmisphæricis.
Saurauja, Prunus: 3 species of Aralia, Castanea, Quercus, etc. A species of Panicum is here cultivated; the Assamese know it by the name Cheena, 3 species of Polygonatum, including that from Laim-planj, one foliis carnosis oppositis. 2 species of Begonia, making altogether six. The Amaranthacea of Deeling is here found extensively, it often assumes the form of a climber of considerable size. Musa farinosa grows to a great size, 20 to 25 feet. Bambusa in flower has stems about two inches in diameter. Sterculia flowers were observed on the ground. In the afternoon it rained slightly. This is the coldest place I have visited on these hills: in the evening and earlier parts of the night there is a very cold draught down Thuma-thaya.
The Anthistiria found on the more elevated portions of these hills, is probably different from that of the plains. Urticea are here found in abundance.
Nov. 26th.—This morning the atmosphere being beautifully transparent, very high land plentifully sprinkled with snow was visible to the N.W. by W., and to the N.W. a slight peep of the Himalayas was gained. Started at 9, and commenced the ascent; we arrived at our halting place at 11½. The greater part of the march was a steep ascent through dry woods, the ground being very slippery owing to the leaves. Bucklandia occurs in abundance and of a large size, and attains a much greater height than Sedgwickia: found many interesting plants and a small Conifera, probably an Araucaria or a Taxus.
I continued the ascent until about 12, but the scene had totally changed; the whole face of the mountain on the S. side being entirely destitute of trees, and in many places quite naked. The ascent was not very difficult, and occupied a little more than an hour. This acclivity is chiefly occupied by Graminea, all past flowering, all adhering very firmly to the rock, which is quartzose and greyish blue outside, excessively angular: Gentianeæ 2: a beautiful Campanula, Hypericum, Viburnum, Spiræa, Bryum Neckera, Pteris, Scabiosa, some Compositæ, one or two Vaccinioidea, and a curious shrubby Rubiacea evidently a Serissa, were observed. The top, which represents a ridge, is partially wooded, the trees being the continuation or rather termination of the jungle that covers the whole northern face of the mountain. Here I saw Bucklandia, a Pomacea, Crawfurdia, Deutzia, Cynaroidea, Viburna 2, some ferns. Brachymeum, Neckera, Lichens several: a Caryophyllea and a Berberis.
All these were somewhat stunted. The various views were beautiful, embracing a complete panorama, but unfortunately obscured towards Lama by trees. The Lohit was seen extensively from the Koond to Ghaloom’s, and to the plains to an immense distance. The whole range of Abor Hills and a great portion of the Naga, some of which appeared very high, were likewise seen: to the S.E. high ridges not far distant and covered with snow, limited the view; slight snow was visible on the peak seen from Suddiya. The descent was very tedious owing to the excessive slipperiness of the grass: it was dangerous, because a slip would have frequently dashed you to pieces, and in all cases would have hurt one severely.
Nov. 27th.—Descended to Yen: near our halting place we gathered a fine Pomacea arborea in fruit: a Symplocos, and observed Wallichioideæ and Calamus. The plants of the greatest interest gathered were an Acer, an Epilobium, a Hoya grandiflora, Eurya, Hypericum, a fine Arundo, Bucklandia: Cotoneaster microphylla, a Sabia, Coriaria, Abelia? a rare Dipodous Orchidea of the same genus as a dwarf plant of the Cossiya Hills. Rhododendron, scandesent Eleodendron.