Cross-slabs are among the most common surviving traces of early Irish Christian practice, simple flat stones incised with a cross and sometimes a name or inscription, serving as grave markers or devotional objects. At Bobsville, these six are all sandstone, and they sit in the inner face of the wall near the south-western entrance, easy to walk past without registering what they are.

One of the slabs, measuring roughly 69 by 48 centimetres, carries a ringed cross, the familiar form in which a circle connects the arms, rendered here in double incised lines with D-shaped terminals at the ends of each arm. Beneath one of the arms, a name has been carved, though the notes do not record whose. The site was first documented by Crawford in 1913, who noted at least one cross-slab with a ringed cross. Further slabs came to light during the 1960s and 1970s, with Moore and Kenny recording the group in 1976. The gradual accumulation of finds over more than sixty years suggests these stones were not all discovered together, and the present arrangement, incorporated into the wall rather than laid flat or freestanding, likely reflects later disturbance or consolidation of the graveyard rather than any original intention.

Visitors approaching from the south-west entrance are closest to where the slabs sit, set into the wall at roughly eye level or below. The incised lines can be subtle, particularly in flat or overcast light, so it is worth taking a moment to let the eye adjust to the texture of the stonework before moving on.