It was easy enough to carry the slates by ship from Gwynedd’s estuaries and ports, then feed them on to the canals that supplied materials to industrial areas.
Roedd yn ddigon hawdd i’w cario ar longau bychain o borthladdoedd Gwynedd, at gegau’r camlesi fyddai’n cyflenwi defnyddiau i’r ardaloedd diwydiannol.