In the third series, we watch an early scene of a
mercenary career. Cerebus watches the forging of his
first sword. As soon as he holds it in his hands, he
starts an imaginary fight and wildly brandishes it in
the smithy. Unfortunately he stabs the blacksmith, and
we see a very self conscious aardvark tiptoeing away,
not without leaving a few coins in the corpses hand.
It says "His first sword". But why is Cerebus already
wearing a black vest? That appeared much later in his
career, after he has used many swords. Maybe it's the
first one made for him and legally paid.