utque miles ante me quidam, discriminate capite, quod in aequas partes ictus gladii fiderat validissimus, in stipitis modum undique coartatus haereret.
Translation :
and that in front of me a soldier with his head cut in two, and split into equal halves by a powerful sword stroke, was so pressed on all sides that he stood erect like a stump.
Edition :
Ammianus Marcellinus. With An English Translation. John C. Rolfe, Ph.D., Litt.D. Cambridge. Cambridge, Mass., Harvard University Press; London, William Heinemann, Ltd. 1935-1940.