1. The Bishops and Clerks consist of seven islands, the largest of which are Carreg Rhossan and Bishop's Rock. The islands were notoriously dangerous to sailors approaching Milford Haven from the south-west. Eggs from the islands were reportedly taken, some for eating and some for sending to Bristol to be used for fining wines. Sheep were fed on three of the islands. It was noted that a former tenant of Ramsey Island used to voyage to Carreg Rhosson every summer, in order to take several dozen puffins and obtain the feathers from their soft plumage.

Sources include:
Fenton, R. A Historical Tour Through Pembrokeshire

N Vousden, RCAHMW, 7 October 2013

2. The principal islands in the group comprise South Bishop (NPRN 126319), North Bishop (SM 6705 2805), some 230m x 150m, Careg Rhoson (SM 6677 2552), some 222m x 131m and the solitary Daufraich (SM 6613 2320), 285m x 115m. All islands would have been considerably larger with lower sea levels in Mesolithic times and may well have supported transient or permanent settlements at this time. Recorded during the CHERISH project with aerial photography. ? Crown: CHERISH PROJECT 2017. Produced with EU funds through the Ireland Wales Co-operation Programme 2014-2020. All material made freely available through the Open Government Licence.

T. Driver, RCAHMW - CHERISH Project. 16 Feb 2018