On pg. 201 from D’Ooge’s Latin for Beginners
HERCULES CLEANS THE AUGEAN STABLES AND KILLS THE SYMPHALIAN BIRDS
Then, Eurystheus commanded this much harder labor to Hercules. A certain Augeas, who at that time possessed the kingdom of Elis, had three thousands of oxen. These were kept in a huge stable. Hercules was ordered to clean this stable within the span of one day because it had not been cleaned for thirty years. He eagerly undertook the affair, and at first dug a very large ditch with the most troublesome labor through which the water of the river from the mountains led to the wall of the stable. Then, he destroyed a small part of the wall and let in the water into the stable. In this way, he very easily made an end of the work in one day.
After a few days, Hercules journeyed to the town of Stymphalus; for Eurystheus had ordered him to kill the Stymphalian birds. These birds had iron beaks and devoured wretched men. After he arrived at the place, he saw the lake in which the birds dwelt. However, in no way could Hercules come near to the birds; for the lake consisted not of water but of mud. At last, the birds, having been frightened for some reason, flew into the air and a large part of them was killed by Hercules’ arrows.