The "Pirate" Grave

Well I did have a different update in mind today but this excited me and my class so much.
As we are looking at Public Art we have been visiting different places, yesterday was London and today because there were only five of us our teacher took us to our local gallery. While there we started discussing churches (our college building began life as part of the church)  and how they're beautiful but at the same time quite sinister to us for different reasons.
After our teacher phoned the local church, Saint Mary's and asked if we would be allowed to visit.

As we walked round the church we couldn't help but discuss the darker side and wonder what the church had seen as some features are quite strange, including a staircase that starts five foot up from the floor and says a person is buried there.

We then went outside to look at the space and to look at the graves, we found it quite interesting that some were broken and appeared to be filled with bricks, as we wondered around our teacher asked us if we had seen the "Pirate" grave (we live on the coast), two people had heard of it, but me and two others had never heard of it, our teacher began leading us round in search of it, eventually we found it located right next to the road side only hidden from view by a small wall and separated from the other graves.

We all found the grave  unusual, as even though the skull and crossbones are often seen on graves this one appears sinister due to the bone protruding from the jaw and the graphic detail on the skull, the surface is completely smooth which made us wonder who the person was and if their name was ever written on the grave as there is no sign of even faded writing. Another thing that made us wonder if this grave contained someone who had done something bad, was the grave is in the completely opposite direction to all the others (I'm not to good on my church research but its something to do with the graves face the same way to greet God?)

Eventually after standing staring at the grave for 20 minutes and working from the idea that the grave contained a pirate we decided that the person had done something bad but had repented in the end which allowed him or her to be buried in the church grounds but something had happened  and due to that the church didn't want this person to be noticed or remembered which is why there is no name and why it is buried in the wrong direction and so far away from the other graves.

Close up

I'd like to know if anyone knows anything about this type of thing as I've looked up images and can't find any similar to this design, and also if anyone has anything they think it would be great to hear :D