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SUMMARY:
From Chianang the diarist reports illness among companions, a reconnaissance with Kunio toward Chubumbu La with notable rhododendrons and Nomocharis, persistent rain, and route details. Plans to attempt the Chubumbu La despite local advice are noted, along with Brahminy Ducks near Lanyong; subsequent halts include botanical collecting and bird observations, before proceeding up-valley toward a pass.

CONTENT:
Chianang.

...vomiting everything he tried to swallow. He has no strength today at all. I went with Kunio towards Chubumbu La, which is about 6 miles from here, and has not too much snow on it to be crossed. There was nothing to be seen till we reached the head of the valley, then rhododendrons in profusion, P. pauliana all over the place, Nomocharis souliei the best of all, masses of Rhod. aff. repens, in full flower.

3rd June. CAMP CHIANANG. 5 miles. B.P. 189.0° Temp. 50° Time 11:30 am. Ht. approx. 12929'.
Rained most of the night and all today without a stop. Path follows the left bank for 2 miles, then crosses by a foot bridge to right bank. At mile 3 a side valley from the Chubumbu La is reached and crossed. The Chubumbu La lies at a bearing of 162° Magnetic and from here is about 4 miles distant. Follow up this valley left bank for ½ mile, then turn up a side valley. Ascent fairly steep for 1½ miles to a plateau, where there are 3-4 houses, where yaks are grazed in summer. Very swampy ground. We saw nothing at all today, as Lin was not yet too fit and Tsungpen only just able to come up, we did nothing today, but sat in camp and changed flowers. I'm afraid this valley is not as good as I had hoped: we are still too early. So I remain only two days and then go to the Chubumbu La for a day, to see if I can get across. It does not look impossible, though the locals say it is, and will remain so for another 2 months or more, when the Lhopas will come over. There are Brahminy Duck near Lanyong, and I saw they have their young one now and quite big.

4th June. Halt. Chianang. Fine intervals with a little sun up till 12:00 noon, then rain all day. Went up to the South, and had a fairly good day. Rhod. repens is abundant, but not above 14000'. With it were P. harrisii, and P. valentiniana 3953. This must cover the hillside, but is hardly in flower yet. Just as at Tsari Chikchar, it comes just after P. harrisii. First one gets a blue violet hillside, which is then turned into a deep velvety crimson one. P. vernicosa 3951, is here about half blue and half white. Saw a good many Grandala coelicolor above, some rubythroats; the latter is not the Yunnan bird.
Diapensia himalaica 3949, Potentilla leucanota 3950 - Bell common, Pot. stenophylla 3956, Pot. microphylla 3957 & 41, Pedicularis formis 3959.

5th June. Halt Chianang. Rain early at night, but a fine day till 2:00 pm, then thunder and rain and snow on the hills. Cleared 2 hours later. Went up the valley, past two more yak grazing grounds to a pass,

SUMMARY:
The diarist describes views toward Pa La and Lanyong, debates whether the seen pass is Pa La or Lingtsangha La on the route to Migyitun, and notes a prominent peak likely the Migyitun Peak. Camping north of Chubumbu La, they record weather, altitudes, and fieldwork with Thompson, including bird specimens and several Primula and Omphalogramma finds, with a halt day spent revisiting the Chubumbu La.

CONTENT:
about 2 miles from here. From there we could see the Pa La & Lanyong. The Pa La lies at a bearing of 266° & Lanyong at 47°. I should say that the Pa La was further than Lanyong but not much. Again failed to find flowers, though P. tsariensis is in masses everywhere, P. dryadifolia common to the N. of the pass, some P. Valentiniana a mile South. This valley is said to lead to Migyitun, but we could not see how it does so. Shokakuling was bloody pleasant on the way up, but with bare patches. They must be sitting, but we could find no nests. Also collected two more Phylloscopus tibetanus & a flycatcher with eggs c/3. There is obviously nothing yet, this side of the main Range. There is a fine peak to the S. of the Pa La. Can it be the Pk. to the E of Migyitun - (N.E.?). I have heard that the Pass we saw today is not the Pa La but the Lingtsangha La, viz on the road to Migyitun. In that case the peak is almost certainly the Migyitun Peak. It is almost impossible to get information that one can rely on though. - Chubumbu La - see June 2.

6th June. Camp 2m N of Chubumbu La. B.P. 189.8° Temp 35° Time 3.0pm. Ht. approx. 12596'. Rained in the night up to 7.0am, then cleared & was a fine day with a good deal of sun till 3.0pm. Then mist & some rain, clearing up later. Some thunder yesterday evening & again this evening. Thompson & I went direct South from camp over the hills, but ran into a lot of mist, & so to get down to the valley we had a series of cliffs to negotiate. A valley comes in from the SW just above here, up it we went. The only real find was Omphalogramma minus 3970, which is fairly common on the edge of the last bit of abies forest. P. Valentiniana & P. Pauliana & P. tsariensis are coming everywhere. A nice little dwarf rhododendron was No. 3975, common about here, but nowhere else. Although reports of the Chubumbu La are not a bit favourable, we go over it tomorrow & hope for a fine day.

7th June. Halt. Misty, but fine nearly all day: some showers. Went up to the Chubumbu La, at mile 2. B.P. 187.2° Temp. 45° Time 7.30 am. Ht. approx 13900'. A good day on the whole. On our way up to the pass we came across a lot of what I had thought to be a new primula collected beyond the Lo La under No. 3762. At that time I could not make it out, but now I see it