There is one corner of the burial yard which I'm a bit curious about. It's on a little mound of it's own and appears to be older than the rest. A lot of the markers there are crude stone, without inscription, often a sign of really old markers. There also appears to be a richly carved cross slab, which would likely be medieval.
Maybe Cladh Hallan Cememtery is a mostly modern cemetary, but the site was chosen at least in part because of the even older small burial yard there?