The OS 1st edition map dating to 1886 shows the main siding with a small branch line running behind three wharf-front buildings. The line branches at SN61679318 and one arm continues to the end of the quay frontage at SN61679324. The maximum length of the siding (from Ynyslas Station to the end of longer branch of the siding) was 270m.

Events and Historical Information:
The piled front of the wharf was first driven in October 1863 by the railway company to allow barges towed by the company tug to bring in materials for the construction for the line. A siding was run along the edge of the Leri to link to the mainline. The planned length of the siding was 400 yards (365m), but it is doubtful that this length of line was ever built. On 16 February 1871, the railway's traffic manager reported that the Penrhyn siding and wharf were out of use for the purposes of railway construction and that Jones and Griffiths, timber merchants of Aberdovey, would rent it for £10 per annum. Local resident, Tegwen James, recalls that his grandfather, who farmed at Cerrig Caranau, harvested an oak tree and took it to the sawmill in 1876-7. The resulting planks were used to build a cart. The siding was closed and dismantled after April 1896 when Mr Hughes Jones transferred his business to the new works on the west bank.

Sources include:
Green, C C 1993, The Coastlines of the Cambrian Railways, Vol 1: Machynletth to Aberystwyth.
OS 25in 1st Edition mapping, surveyed 1886.
Correspondence Tegwen James, Llanilar, 6 January 2013

Maritime Officer, RCAHMW, January 2013.