Peters route is shown too far to the right. It is the next line of chalked holds in the slight dihedral to the right of Siege Warfare.

If Peter's Route is the next one to the right, then what is the route that the picture is calling Peter's Route? I did that route to the set of chains below the roof and it seemed like 12a.

A near as I can tell to stop at the anchors under the roof is Excalibur 12b. If you continue and stop at Loose Cannon's anchors it is 12c, and if you continue clear to the cliff top it is Gangland 12d. Rock Climbing New Mexico, Jemez Rock, and the old Rock & Ice guide all list different things.