Finished product was transported to the slate quays of Porthmadog by the Croesor Tramway.

[1] The mill was upgraded in 1878 by the addition of a steam engine, and there were around 100 men working in the quarry at the time.

[1] Fron-Boeth was an ambitious attempt, begun in 1886, to extend the Pant Mawr workings, starting from a new mill site at a lower level.

[5] The main mill was steam powered, and above it, a single acting table incline was used to connect to a number of chambers which had been created below the original Pant Mawr workings.

Boyd states that Pant Mawr had been abandoned by 1916, and the tramway lifted by 1920, although large scale Ordnance Survey maps show no rails in 1900.

Working of Fron-Boeth quarry ceased during the First World War, although the rails on the tramway remained in situ for many years.

[5] Several of the Pant Mawr adits are still open, and the inclines from them to the mill are still in good condition.

There is a slate lined channel beside the single acting table incline, indicating that it may have been a water balance.

[7] The tunnel, one of the longest cut for horse drawn traffic, is accessible for most of its length, although it has collapsed near the northern portal.

[8] Media related to Fron Boeth & Pant Mawr quarries at Wikimedia Commons