Slates were loaded onto narrow gauge wagons near the quarries and drawn by horses to Tyddyn Bengam, where the narrow gauge wagons and their contents were loaded onto standard-gauge transporter wagons, three at a time.
Slates were moved from the quarries on narrow-track vehicles and pulled by horses to Tyddyn Bengam, where they were loaded onto bigger-standard-track transporter vehicles, three at a time.