This is an eastern section of the bank and ditch known as Cwys yr Ychen Bannog, NPRN 303652. After a following a gap of 280 metres across a bog, a 240m stretch runs from SN7362161247 to SN73836113, up the final ascent to the summit area of Garn Gron. It skirts cairn NPRN 400924. J.J Hall, Trysor, 28 March 2013