found. This the Khukeens
bring down for sale.

_April 21st_.--Continued our course, performing about twelve miles
between 7 and 5, inclusive of one hour's halt. At some distance from
Tapaw and thence throughout the day, here and there occur rapids, which
are much worse, from the stream being impeded by large rocks. In some
places it is divided, in others, compressed between hills, and here it is
very deep.

_April 23rd_.--Arrived at the Irrawaddi. The Mogoung river is very
uninteresting; the stream being generally slow, sandbanks very abundant,
as well as stumps of sunken trees. At its mouth it is deep, and about
seventy yards across. The banks are either overgrown with trees or else
grassy; the grasses being Arundo and Saccharum. On the steep banks of
the hills where these descend into the river, ferns are common together
with an Amaryllidea out of flower. Cadaba is common, as well as a large
Mimosea. Rosa continues; as also AEsculus. On the road by which the
Chinese branch off from Tapaw to the Irrawaddi, I gathered an arborescent
Apocynea foliis suboppositis, and a Homalineous tree, floribus
tetrameris; Salix is common all down the river. Teak only occurs
occasionally. In one place I gathered Lonicera heterophylla, a fragrant
Valeriana? and Jonesia in abundance; this last being here apparently
quite wild. Adelia nereifolia, a Ficus, Ehretia arenarum, and the usual
sandy plants occur on the banks. Pistia, Salvinia and Azolla are common.

The Irrawaddi opposite the entrance of the Mogoung river, is 600 yards
across. It is a noble stream; has risen a good deal, and presents one
unbroken sheet of water. The banks are by no means high, and are grassed
to the brink. The water is cold and clouded; its temperature is 66.5
degrees, that of air in a boat 88.5. We reached Tsenbo about 1 o'clock,
having passed five or six villages, mostly small, and inhabited by Shans.
Tsenbo numbers about 30 houses, but these as throughout Burma, as far as
we have seen, are small; it is situated on a low hill on the left bank.
Both banks are hilly, especially the right. The river has risen
enormously during a halt here--many feet. In one hour we found it to
rise about 16 inches. At this place I gathered a fine blue Vanda, and a
curious tree habitu Thespiae: stigmatibus 4. Between this and the
entrance to the narrow defile Kioukdweng, which is about 1.5 miles
distant, three villages occur. This entrance is well marked,