Note 431 — Chapter II · THE ROMAN INVASION.
Reading edition
"About this time it would appear that Julia, the wife of Severus, and the greatest part of the imperial family, were in the country of Caledonia; for Xephilin, from Dio, mentions a very remarkable occurrence which then happened to the Empress Julia and the wife of Argentocoxus, a Caledonian," &c.—Itiner. Septent. p. 104.