Thursday 18th. Nelson dreads the road this morning being compelled to ride over the mountains owing to a severe attack of cholera morbus last night. The road after leaving camp strikes over the mountains to Boise River about 5 miles to where we had the first view of it. Followed down it for some 7 or 6 miles when we camped. The road has been quite rough today and dust so dense we could not see the oxen at times. I sympathize with any one who is unable to walk such a day as this has been for dust.