You may be talking about the ones I sent you pics of. If so, I remember there being atleast one set, possibly two, of anchors. I recall three climbs. They all started in the gully except the OW seems to be a variation of the hand crack once you gain the slanted ledge area about half way up. One is the handcrack, then the off-width which I remembered to share a set of anchors on a flat 4'x4' ledge. The anchors, if I remember right, were on the floor of the ledge and needed webbing to avoid rope rub. The third climb was to the right and followed an arete for to most of the climb. When climbing the arete, your back was facing down the gully. I can't recall if there were anchors for this thrird one or we used natural pro for the anchors. I remember it being in the 5.7-5.9 range.
I have only climbed them on TR when guiding a high school camp group. We had everyone do Eraser Head routes, moved over to these three and then finished on Echo Wall. To set up for the arete we would climb up from the notch between Hawk and Eraser Head and step over a block to set the anchor. Then I would jump across, 3'-4', to the ledge to set a TR on the anchor for the cracks and wrap down.
There is another route to the left of these in the 5.6-5.8 range, 70'-80' (If memory serves me). I am sure I didn't FA it. It starts in the the brush and heads up a few moves to an easy seam that goes up and left and then goes right toward the top having a book on your right. There are bolts for an anchor which I first found when looking to rap off the top down into the gully. This set of bolts are not on the true summit but the right side of the normal top out for the multi-pitch climbs. Not sure if they were placed as anchors or to rap off. From their position they could be the top of a multi-pitch route on Hawk and nothing to do with the crack/seam since there is serious rope drag when pulling the rope from the gully because you go around a corner. Thought my rope was stuck a few times and had to back way up to Echo to get some movement. It would need a different set of of bolts in order to TR this route because of rope drag.
I have no idea who put in any of these routes.