Wikipedia surfing brought this to my attention. It's a diary entry from a party that crossed the Great Salt Desert in 1850.
Finally Allen and one of the other men dropped to the ground exhausted, when, to the amusement of the others, Allen began to pray.
"O Lord Almighty, send us just one drop of rain!" Immediately from a few fleecy clouds scattering rain drops began to fall, and as Allen and his companions had a rubber blanket, they quickly spread it out. But not a sufficient quantity of water fell to admit of its running together