FROM TONKIN TO INDIA
able, for the boatmen could not touch bottom, the current running two knots an hour; but both above and below there were rapids of far greater strength. Its breadth at the time of our crossing (18th April) varied from 119 yards to 162 yards. In the rains there is a rise of upwards of 39 feet, and its width then must be over 200 yards. The water was cold, 66A'2 Fahr.,
Embarkation of Mules at Notcha Tian-pi.
whilst the shade temperature of the air stood at 950. I had
remarked this chill before, when comparing its waters at Pakai
with those of the Nam Ou.
At Notcha Tian-pi there was a little Chinese post for the
customs on tea coming from the right bank, Mong-hai, Mong-se,
and Mong-yang ; duty, one to two atensa the hundred Chinese