Gregorius Turonensis, Historiae, 10.3, Quod exercitus Childeberthi regis in Italiam abiit:
Olo autem dux ad Bilitionem huius urbis castrum, in campis situm Caninis, inportunae accedens, iaculo sub papilla sauciatus, cecidit et mortuus est
"Duke Olo went rashly to Bilitio, a stronghold of this city [Milan], situated on the plains called Canini, and was wounded with a dart under the nipple and fell and died."
