Bettie's Books
A Stuga On the Cusp of the Orust Riviera, tucked away next to a hobbit hole in the woods.
Roman History, Volume IX: Books 71-80 by Cassius Dio, Earnest Cary
bookshelves: autumn-2014, reference, skim-through, skoolzy-stuff
In AD 208 the Emperor Septimius Severus led a substantial field army and his warring sons into the north. His operations, which concluded in AD 211, were savagely criticised by Cassius Dio, a contemporary writer (Dio Roman History 77. 11.1-77.15.4)
A skim through to the British bits: https://archive.org/details/diosroman...
Page 383 is the start...
Don't go thinking for one minute that Dio's history is defunct, it helped enormously to pin down the reasons for Timewatch - The Mystery of the Headless Romans 
HUZZAH! Caracalla (nickname definition = hoodie *snort*) decided to see off dear papa and was thwarted; get this, ailing Septimus Severus *pantomime boo* let his son, hoodie, off the hook.
You can't make this stuff up - well, that's not true, Tacitus did!
9
4