Thursday August 11th. This morning some of our cattle are sick and we hardly know what is the matter. They are not poisoned. Many have died around us during the night and this morning. It is the prevailing opinion that swimming the river so choked up with dust caused irritation of the lungs as they bleed very freely at the nose and mouth just before they die. Traveled down this creek about 5 miles to where we leave it again and camped again to let our stock recruit a little.