A large area of sands and saltmarsh is shown backed by sea defences 'The Bulwark' on an historic chart. Black Scar skirted by Dafen Pill is to the west. Admiralty Sailing Directions dating to 1884 note 'One bend of this channel turns in for Llanelly pier, the other for Salthouse point, and from thence over the northern shore to Cobs pill and Loughor, seperating the Dafan from the Bacas sands, which nearly fill up the inner basin. The small streams or pills which intersect these sands at low water, are crossed in several places by fishing weirs; and an abundance of cockles give support to numerous families, and find a ready market in the larger towns of the Bristol channel.'

Sources include:
Admiralty; 1884, Sailing Directions for the Bristol Channel, 4th Ed, pg92-3
Historic Admiralty Chart 1167-A3, RCAHMW Digital Collections soruce from the UK Hydrographic Office and published in 1839

Maritime Officer, RCAHMW, August 2014.