In 847 Lupus accompanied Charles the Bald to a conference at Meerssen, whereby the three brothers again swore peace with one other. He was sent on a mission to Pope Leo IV in 849.
In 847, Lupus journeyed with Charles the Bald to a conference held at Meerssen, where they reaffirmed their pact of peace amongst themselves.  He was then sent on a mission to Pope Leo IV in 849.