Severus now crossed Mesopotamia and made an attempt on Hatra, which was not far off, but accomplished nothing; on the contrary, his siege engines were burned, many soldiers perished, and vast numbers were wounded. He accordingly retired from there and shifted his quarters.
Edition :
Dio's Roman History. Cassius Dio Cocceianus. Earnest Cary. Herbert Baldwin Foster. William Heinemann, Harvard University Press. London; New York. 1914-.