Antrophyllum I noticed about Yen; towards Yen, I diverged from the path to visit the place whence the stones are procured, which the Mishmees use as flints for striking lights:  this stone is found on the S. Western face of the mountain:  the stones or noduli are frequently sub-crystalline, and are imbedded in a sort of micaceous frangible rock:  they are very common, of very different sizes, with glassy fracture; the best are hard; the bad easily frangible, their weight is great.  The inclination of this bed is considerable; overlying it at an inclination of 45 degrees, is the grey quartzose rock which forms the chief part, and perhaps nearly the whole, of the mountain.  The Mishmee name for the noduli is Mpladung.

In the jungle at Yen occurs a huge Palm evidently Caryota, foliis maximis supra decompositis; the diameter of the trunk is 1.5 to 2 feet.  It is said to die after flowering:  the natives use the central lax structures as food.  The Yen Gam promises to send me specimens to-morrow.  The Palms I have hitherto seen are Wallichia, one or two Calami:  Wallichioidia trunco 5-10 pedali, and a Phaenicoidea, but this I only saw at the foot of the mountains near Laee Panee, and the small Areca common about Negrogam.  The name of the large Palm in Assamese is Bura Sawar.  All the plants common to these and the Cossiya mountains, with one or two exceptions, flower much earlier here, those being all past flowering which I gathered in flower on the Cossiya hills in November last.  This is owing to the greater cold, and the consequent necessity for the plants flowering at an earlier and warmer period.

A species of ruminant, or, according to the native account, a species of Pachydermata called the Gan Pohoo, occurs on Thuma-thaya.  At the summit of the mountain the ground was in one place rooted up, the Mishmees said, by this animal, which they describe as a large Hog, but which I should rather take to be a kind of Deer.

Nov. 28th.—­Returned to Deeling.  At the commencement of the principal descent we gathered Betula and another Cupulifera, both moderately sized trees.  Anthestina arundinacea, is about this place very common, and an Andropogon, Culmis ramosis which I had previously brought from the Abor hills.  About half way down by a present of kanee (opium), I succeeded in getting the arborescent vitex, which is the most striking tree of all when in flower.  Lost sight altogether of Bucklandia, nor did I observe Sedgwickia.  Gathered at the foot of Thuma-thaya a Caelogyne in flower, allied to C. Gardneriana; Alsophila is common towards the base.

In the evening the Yen Gam came up according to his promise with the gigantic Palm, with male inflorescence, it is a Caryota; he likewise brought Sarcocordalis, Rafflesiacea, and a curious pubescent Piper.  He also added the female flowers of another Palm, which, according to him, is another species of Sawar, or Caryota:  the inflorescence is of an orange yellow.  A tree with the habit of Pterospermum occurs on Thuma-thaya, low down Habenaria uniflora on rocks in the Dirsoo Panee, or river; Kydia occurs about Yen, but not higher.